cas_number stringlengths 5 11 | disagreements listlengths 0 2 ⌀ | id stringlengths 3 80 | pel_mgm3 stringlengths 1 12 ⌀ | pel_ppm stringclasses 52
values | source stringclasses 2
values | source_quote stringlengths 22 164 | stel_mgm3 stringclasses 42
values | stel_ppm stringclasses 24
values | substance stringlengths 3 139 | url stringlengths 58 135 | verified_fields listlengths 2 7 | also_reported listlengths 1 5 ⌀ | ceiling stringclasses 11
values |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
76-11-9 | [] | 1-1-1-2-tetrachloro-2-2-difluoroethane | 4170 | 500 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 1,1,1,2-Tetrachloro-2,2-difluoroethane | 76-11-9 | 500 | 4170 | - | | null | null | 1,1,1,2-Tetrachloro-2,2-difluoroethane | https://referencesource.org/workplace-exposure-limits/1-1-1-2-tetrachloro-2-2-difluoroethane/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
50293 | null | 1-1-1-trichloro-2-2-bis-p-chlorophenyl-ethane-see-ddt | null | null | https://www.dir.ca.gov/title8/5155.html | 50293 | | 1,1,1,-Trichloro-2,2-bis(p-chlorophenyl)ethane; see DDT | null | null | 1,1,1,-Trichloro-2,2-bis(p-chlorophenyl)ethane; see DDT | https://referencesource.org/workplace-exposure-limits/1-1-1-trichloro-2-2-bis-p-chlorophenyl-ethane-see-ddt/ | [
"cas_number",
"substance"
] | null | null |
71556 | null | 1-1-1-trichloroethane-see-methyl-chloroform | null | null | https://www.dir.ca.gov/title8/5155.html | 71556 | | 1,1,1-Trichloroethane; see Methyl chloroform | null | null | 1,1,1-Trichloroethane; see Methyl chloroform | https://referencesource.org/workplace-exposure-limits/1-1-1-trichloroethane-see-methyl-chloroform/ | [
"cas_number",
"substance"
] | null | null |
79276 | null | 1-1-2-2-tetrabromoethane-see-acetylene-tetrabromide | null | null | https://www.dir.ca.gov/title8/5155.html | 79276 | | 1,1,2,2-Tetrabromoethane; see Acetylene tetrabromide | null | null | 1,1,2,2-Tetrabromoethane; see Acetylene tetrabromide | https://referencesource.org/workplace-exposure-limits/1-1-2-2-tetrabromoethane-see-acetylene-tetrabromide/ | [
"cas_number",
"substance"
] | null | null |
76-12-0 | null | 1-1-2-2-tetrachloro-1-2-difluoroethane | 4170 | 500 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 1,1,2,2-Tetrachloro-1,2-difluoroethane | 76-12-0 | 500 | 4170 | - | | null | null | 1,1,2,2-Tetrachloro-1,2-difluoroethane | https://referencesource.org/workplace-exposure-limits/1-1-2-2-tetrachloro-1-2-difluoroethane/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
76120 | null | 1-1-2-2-tetrachloro-1-2-difluoroethane-fluorocarbon-112 | 4,170 | 500 | https://www.dir.ca.gov/title8/5155.html | 76120 | | 1,1,2,2-Tetrachloro-1,2-difluoroethane; fluorocarbon 112 | 500 | 4,170 | null | null | 1,1,2,2-Tetrachloro-1,2-difluoroethane; fluorocarbon 112 | https://referencesource.org/workplace-exposure-limits/1-1-2-2-tetrachloro-1-2-difluoroethane-fluorocarbon-112/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
79-34-5 | null | 1-1-2-2-tetrachloroethane | 35 | 5 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 1,1,2,2-Tetrachloroethane | 79-34-5 | 5 | 35 | X | | null | null | 1,1,2,2-Tetrachloroethane | https://referencesource.org/workplace-exposure-limits/1-1-2-2-tetrachloroethane/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
79345 | null | 1-1-2-2-tetrachloroethane-acetylene-tetrachloride | 7 | 1 | https://www.dir.ca.gov/title8/5155.html | 79345 | S | 1,1,2,2-Tetrachloroethane; acetylene tetrachloride | 1 | 7 | null | null | 1,1,2,2-Tetrachloroethane; acetylene tetrachloride | https://referencesource.org/workplace-exposure-limits/1-1-2-2-tetrachloroethane-acetylene-tetrachloride/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
76-13-1 | [] | 1-1-2-trichloro-1-2-2-trifluoroethane | 7600 | 1000 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 1,1,2-Trichloro-1,2,2-trifluoroethane | 76-13-1 | 1000 | 7600 | - | | null | null | 1,1,2-Trichloro-1,2,2-trifluoroethane | https://referencesource.org/workplace-exposure-limits/1-1-2-trichloro-1-2-2-trifluoroethane/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | [
{
"as_of": "2026-08-05T00:00:00",
"field": "ceiling",
"source": "https://www.dir.ca.gov/title8/5155.html",
"source_quote": "76131 | | 1,1,2-Trichloro-1,2,2-trifluoroethane | 1000 | 7600 | 2000 ppm | 1250 | 9500",
"value": "2000 ppm"
},
{
"as_of": "2026-08-05T00:00:00",
"field": "stel... | null |
79-00-5 | [] | 1-1-2-trichloroethane | 45 | 10 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 1,1,2-Trichloroethane | 79-00-5 | 10 | 45 | X | | null | null | 1,1,2-Trichloroethane | https://referencesource.org/workplace-exposure-limits/1-1-2-trichloroethane/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
594-72-9 | [
{
"field": "pel_ppm",
"versions": [
{
"as_of": "2026-08-05T00:00:00",
"source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1",
"source_quote": "1,1-Dichloro-1-nitroethane | 594-72-9 | (C)10 | (C)60 | - |",
"value": "(C)10"
},
... | 1-1-dichloro-1-nitroethane | (C)60 | (C)10 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 1,1-Dichloro-1-nitroethane | 594-72-9 | (C)10 | (C)60 | - | | null | null | 1,1-Dichloro-1-nitroethane | https://referencesource.org/workplace-exposure-limits/1-1-dichloro-1-nitroethane/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
75-34-3 | [] | 1-1-dichloroethane | 400 | 100 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 1,1-Dichloroethane | 75-34-3 | 100 | 400 | - | | null | null | 1,1-Dichloroethane | https://referencesource.org/workplace-exposure-limits/1-1-dichloroethane/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
75354 | null | 1-1-dichloroethylene-see-vinylidene-chloride | null | null | https://www.dir.ca.gov/title8/5155.html | 75354 | | 1,1-Dichloroethylene; see Vinylidene chloride | null | null | 1,1-Dichloroethylene; see Vinylidene chloride | https://referencesource.org/workplace-exposure-limits/1-1-dichloroethylene-see-vinylidene-chloride/ | [
"cas_number",
"substance"
] | null | null |
57-14-7 | [
{
"field": "pel_ppm",
"versions": [
{
"as_of": "2026-08-05T00:00:00",
"source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1",
"source_quote": "1,1-Dimethylhydrazine | 57-14-7 | 0.5 | 1 | X |",
"value": "0.5"
},
{
... | 1-1-dimethylhydrazine | 1 | 0.5 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 1,1-Dimethylhydrazine | 57-14-7 | 0.5 | 1 | X | | null | null | 1,1-Dimethylhydrazine | https://referencesource.org/workplace-exposure-limits/1-1-dimethylhydrazine/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
96-18-4 | [
{
"field": "pel_ppm",
"versions": [
{
"as_of": "2026-08-05T00:00:00",
"source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1",
"source_quote": "1,2,3-Trichloropropane | 96-18-4 | 50 | 300 | - |",
"value": "50"
},
{
... | 1-2-3-trichloropropane | 300 | 50 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 1,2,3-Trichloropropane | 96-18-4 | 50 | 300 | - | | null | null | 1,2,3-Trichloropropane | https://referencesource.org/workplace-exposure-limits/1-2-3-trichloropropane/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
120821 | null | 1-2-4-trichlorobenzene | 40 | 5 | https://www.dir.ca.gov/title8/5155.html | 120821 | | 1,2,4-Trichlorobenzene | 5 | 40 | C | null | null | 1,2,4-Trichlorobenzene | https://referencesource.org/workplace-exposure-limits/1-2-4-trichlorobenzene/ | [
"cas_number",
"ceiling",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | C |
107153 | null | 1-2-diaminoethane-see-ethylenediamine-diatomacous-earth-see-silica-amorphous | null | null | https://www.dir.ca.gov/title8/5155.html | 107153 | | 1,2-Diaminoethane; see Ethylenediamine Diatomacous earth; see Silica-amorphous | null | null | 1,2-Diaminoethane; see Ethylenediamine Diatomacous earth; see Silica-amorphous | https://referencesource.org/workplace-exposure-limits/1-2-diaminoethane-see-ethylenediamine-diatomacous-earth-see-silica-amorphous/ | [
"cas_number",
"substance"
] | null | null |
96-12-8 | [] | 1-2-dibromo-3-chloropropane-dbcp-see-1910-1044 | null | null | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 1,2-Dibromo-3-chloropropane (DBCP); see 1910.1044 | 96-12-8 | - | - | - | | null | null | 1,2-Dibromo-3-chloropropane (DBCP); see 1910.1044 | https://referencesource.org/workplace-exposure-limits/1-2-dibromo-3-chloropropane-dbcp-see-1910-1044/ | [
"cas_number",
"substance"
] | [
{
"as_of": "2026-08-05T00:00:00",
"field": "pel_ppm",
"source": "https://www.dir.ca.gov/title8/5155.html",
"source_quote": "96128 | | 1,2-Dibromo-3-chloropropane; DBCP; see Section 5212 | .001 | .01",
"value": ".001"
},
{
"as_of": "2026-08-05T00:00:00",
"field": "pel_mgm3",
"sour... | null |
106934 | null | 1-2-dibromoethane-see-ethylene-dibromide-section-5219 | null | null | https://www.dir.ca.gov/title8/5155.html | 106934 | S | 1,2-Dibromoethane; see Ethylene dibromide, Section 5219 | null | null | 1,2-Dibromoethane; see Ethylene dibromide, Section 5219 | https://referencesource.org/workplace-exposure-limits/1-2-dibromoethane-see-ethylene-dibromide-section-5219/ | [
"cas_number",
"substance"
] | null | null |
107062 | null | 1-2-dichloroethane-see-ethylene-dichloride | null | null | https://www.dir.ca.gov/title8/5155.html | 107062 | | 1,2-Dichloroethane, see Ethylene dichloride | null | null | 1,2-Dichloroethane, see Ethylene dichloride | https://referencesource.org/workplace-exposure-limits/1-2-dichloroethane-see-ethylene-dichloride/ | [
"cas_number",
"substance"
] | null | null |
540-59-0 | null | 1-2-dichloroethylene | 790 | 200 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 1,2-Dichloroethylene | 540-59-0 | 200 | 790 | - | | null | null | 1,2-Dichloroethylene | https://referencesource.org/workplace-exposure-limits/1-2-dichloroethylene/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
540590 | null | 1-2-dichloroethylene-acetylene-dichloride | 790 | 200 | https://www.dir.ca.gov/title8/5155.html | 540590 | | 1,2-Dichloroethylene; acetylene dichloride | 200 | 790 | null | null | 1,2-Dichloroethylene; acetylene dichloride | https://referencesource.org/workplace-exposure-limits/1-2-dichloroethylene-acetylene-dichloride/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
78875 | null | 1-2-dichloropropane-see-propylene-dichloride | null | null | https://www.dir.ca.gov/title8/5155.html | 78875 | | 1,2-Dichloropropane; see Propylene dichloride | null | null | 1,2-Dichloropropane; see Propylene dichloride | https://referencesource.org/workplace-exposure-limits/1-2-dichloropropane-see-propylene-dichloride/ | [
"cas_number",
"substance"
] | null | null |
76142 | [
{
"field": "pel_ppm",
"versions": [
{
"as_of": "2026-08-05T00:00:00",
"source": "https://www.dir.ca.gov/title8/5155.html",
"source_quote": "76142 | | 1,2-Dichlorotetrafluoroethane; Fluorocarbon 114 | 1,000 | 7,000",
"value": "1,000"
},
{
"as_of": "20... | 1-2-dichlorotetrafluoroethane-fluorocarbon-114 | 7,000 | 1,000 | https://www.dir.ca.gov/title8/5155.html | 76142 | | 1,2-Dichlorotetrafluoroethane; Fluorocarbon 114 | 1,000 | 7,000 | null | null | 1,2-Dichlorotetrafluoroethane; Fluorocarbon 114 | https://referencesource.org/workplace-exposure-limits/1-2-dichlorotetrafluoroethane-fluorocarbon-114/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
75569 | null | 1-2-epoxypropane-see-propylene-oxide | null | null | https://www.dir.ca.gov/title8/5155.html | 75569 | | 1,2-Epoxypropane; see Propylene oxide | null | null | 1,2-Epoxypropane; see Propylene oxide | https://referencesource.org/workplace-exposure-limits/1-2-epoxypropane-see-propylene-oxide/ | [
"cas_number",
"substance"
] | null | null |
2451629 | null | 1-3-5-triglycidyl-s-triazinetrione | 0.005 | null | https://www.dir.ca.gov/title8/5155.html | 2451629 | | 1,3,5-Triglycidyl-s-triazinetrione | | 0.005 | null | null | 1,3,5-Triglycidyl-s-triazinetrione | https://referencesource.org/workplace-exposure-limits/1-3-5-triglycidyl-s-triazinetrione/ | [
"cas_number",
"pel_mgm3",
"substance"
] | null | null |
106990 | [
{
"field": "pel_ppm",
"versions": [
{
"as_of": "2026-08-05T00:00:00",
"source": "https://www.dir.ca.gov/title8/5155.html",
"source_quote": "106990 | | 1,3-Butadiene (see also section 5201) | 1 | 2.2 | | 5 | 11",
"value": "1"
},
{
"as_of": "2026-08-05... | 1-3-butadiene-see-also-section-5201 | 2.2 | 1 | https://www.dir.ca.gov/title8/5155.html | 106990 | | 1,3-Butadiene (see also section 5201) | 1 | 2.2 | | 5 | 11 | 11 | 5 | 1,3-Butadiene (see also section 5201) | https://referencesource.org/workplace-exposure-limits/1-3-butadiene-see-also-section-5201/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"stel_mgm3",
"stel_ppm",
"substance"
] | null | null |
118-52-5 | [] | 1-3-dichloro-5-5-dimethyl-hydantoin | 0.2 | null | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 1,3-Dichloro-5,5-dimethyl hydantoin | 118-52-5 | - | 0.2 | - | | null | null | 1,3-Dichloro-5,5-dimethyl hydantoin | https://referencesource.org/workplace-exposure-limits/1-3-dichloro-5-5-dimethyl-hydantoin/ | [
"cas_number",
"pel_mgm3",
"substance"
] | [
{
"as_of": "2026-08-05T00:00:00",
"field": "stel_mgm3",
"source": "https://www.dir.ca.gov/title8/5155.html",
"source_quote": "118525 | | 1,3-Dichloro-5,5-dimethyl hydantoin | -- | 0.2 | | -- | 0.4",
"value": "0.4"
}
] | null |
108849 | null | 1-3-dimethylbutyl-acetate-see-sec-hexyl-acetate | null | null | https://www.dir.ca.gov/title8/5155.html | 108849 | | 1,3-Dimethylbutyl acetate; see sec-Hexyl acetate | null | null | 1,3-Dimethylbutyl acetate; see sec-Hexyl acetate | https://referencesource.org/workplace-exposure-limits/1-3-dimethylbutyl-acetate-see-sec-hexyl-acetate/ | [
"cas_number",
"substance"
] | null | null |
764410 | null | 1-4-dichloro-2-butene | 0.025 | 0.005 | https://www.dir.ca.gov/title8/5155.html | 764410 | S | 1,4-Dichloro-2-butene | 0.005 | 0.025 | null | null | 1,4-Dichloro-2-butene | https://referencesource.org/workplace-exposure-limits/1-4-dichloro-2-butene/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
123911 | null | 1-4-diethylene-dioxide-see-p-dioxane | null | null | https://www.dir.ca.gov/title8/5155.html | 123911 | | 1,4-Diethylene dioxide; see p-Dioxane | null | null | 1,4-Diethylene dioxide; see p-Dioxane | https://referencesource.org/workplace-exposure-limits/1-4-diethylene-dioxide-see-p-dioxane/ | [
"cas_number",
"substance"
] | null | null |
124094 | null | 1-6-hexanediamine | 2.3 | 0.5 | https://www.dir.ca.gov/title8/5155.html | 124094 | | 1,6-Hexanediamine | 0.5 | 2.3 | null | null | 1,6-Hexanediamine | https://referencesource.org/workplace-exposure-limits/1-6-hexanediamine/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
106945 | null | 1-bromopropane-n-propyl-bromide | 25 | 5 | https://www.dir.ca.gov/title8/5155.html | 106945 | S | 1-bromopropane, n-propyl bromide | 5 | 25 | null | null | 1-bromopropane, n-propyl bromide | https://referencesource.org/workplace-exposure-limits/1-bromopropane-n-propyl-bromide/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
109795 | null | 1-butanethiol-see-butyl-mercaptan | null | null | https://www.dir.ca.gov/title8/5155.html | 109795 | | 1-Butanethiol; see Butyl mercaptan | null | null | 1-Butanethiol; see Butyl mercaptan | https://referencesource.org/workplace-exposure-limits/1-butanethiol-see-butyl-mercaptan/ | [
"cas_number",
"substance"
] | null | null |
71363 | null | 1-butanol-see-n-butyl-alcohol | null | null | https://www.dir.ca.gov/title8/5155.html | 71363 | | 1-Butanol; see n-Butyl alcohol | null | null | 1-Butanol; see n-Butyl alcohol | https://referencesource.org/workplace-exposure-limits/1-butanol-see-n-butyl-alcohol/ | [
"cas_number",
"substance"
] | null | null |
600-25-9 | [
{
"field": "pel_ppm",
"versions": [
{
"as_of": "2026-08-05T00:00:00",
"source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1",
"source_quote": "1-Chloro-1-nitropropane | 600-25-9 | 20 | 100 | - |",
"value": "20"
},
{
... | 1-chloro-1-nitropropane | 100 | 20 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 1-Chloro-1-nitropropane | 600-25-9 | 20 | 100 | - | | null | null | 1-Chloro-1-nitropropane | https://referencesource.org/workplace-exposure-limits/1-chloro-1-nitropropane/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
106898 | null | 1-chloro-2-3-epoxypropane-see-epichlorohydrin | null | null | https://www.dir.ca.gov/title8/5155.html | 106898 | | 1-Chloro-2,3-epoxypropane; see Epichlorohydrin | null | null | 1-Chloro-2,3-epoxypropane; see Epichlorohydrin | https://referencesource.org/workplace-exposure-limits/1-chloro-2-3-epoxypropane-see-epichlorohydrin/ | [
"cas_number",
"substance"
] | null | null |
100005 | null | 1-chloro-4-nitrobenzene-see-p-nitrochlorobenzene | null | null | https://www.dir.ca.gov/title8/5155.html | 100005 | | 1-Chloro-4-nitrobenzene; see p-Nitrochlorobenzene | null | null | 1-Chloro-4-nitrobenzene; see p-Nitrochlorobenzene | https://referencesource.org/workplace-exposure-limits/1-chloro-4-nitrobenzene-see-p-nitrochlorobenzene/ | [
"cas_number",
"substance"
] | null | null |
592416 | null | 1-hexene | 180 | 50 | https://www.dir.ca.gov/title8/5155.html | 592416 | | 1-Hexene | 50 | 180 | null | null | 1-Hexene | https://referencesource.org/workplace-exposure-limits/1-hexene/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
63252 | null | 1-naphthyl-n-methylcarbamate-see-carbaryl | null | null | https://www.dir.ca.gov/title8/5155.html | 63252 | | 1-Naphthyl N-methylcarbamate; see Carbaryl | null | null | 1-Naphthyl N-methylcarbamate; see Carbaryl | https://referencesource.org/workplace-exposure-limits/1-naphthyl-n-methylcarbamate-see-carbaryl/ | [
"cas_number",
"substance"
] | null | null |
108-03-2 | [] | 1-nitropropane | 90 | 25 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 1-Nitropropane | 108-03-2 | 25 | 90 | - | | null | null | 1-Nitropropane | https://referencesource.org/workplace-exposure-limits/1-nitropropane/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
3333526 | null | 2-2-azobisisobutyronitrile-decomposition-product-see-tetramethyl-succinonitrile | null | null | https://www.dir.ca.gov/title8/5155.html | 3333526 | S | 2,2′-Azobisisobutyronitrile decomposition product, see Tetramethyl succinonitrile | null | null | 2,2′-Azobisisobutyronitrile decomposition product, see Tetramethyl succinonitrile | https://referencesource.org/workplace-exposure-limits/2-2-azobisisobutyronitrile-decomposition-product-see-tetramethyl-succinonitrile/ | [
"cas_number",
"substance"
] | null | null |
75990 | null | 2-2-dichloropropionic-acid | 6 | 1 | https://www.dir.ca.gov/title8/5155.html | 75990 | | 2,2-Dichloropropionic acid | 1 | 6 | null | null | 2,2-Dichloropropionic acid | https://referencesource.org/workplace-exposure-limits/2-2-dichloropropionic-acid/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
556525 | null | 2-3-epoxypropanol-see-glycidol | null | null | https://www.dir.ca.gov/title8/5155.html | 556525 | | 2,3-Epoxypropanol; see Glycidol | null | null | 2,3-Epoxypropanol; see Glycidol | https://referencesource.org/workplace-exposure-limits/2-3-epoxypropanol-see-glycidol/ | [
"cas_number",
"substance"
] | null | null |
93-76-5 | null | 2-4-5-t-2-4-5-trichlorophenoxyacetic-acid | 10 | null | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 2,4,5-T (2,4,5-trichlorophenoxyacetic acid) | 93-76-5 | - | 10 | - | | null | null | 2,4,5-T (2,4,5-trichlorophenoxyacetic acid) | https://referencesource.org/workplace-exposure-limits/2-4-5-t-2-4-5-trichlorophenoxyacetic-acid/ | [
"cas_number",
"pel_mgm3",
"substance"
] | null | null |
93765 | null | 2-4-5-t-2-4-5-trichlorophenoxyacetic-acid-talc-see-silicates | 10 | null | https://www.dir.ca.gov/title8/5155.html | 93765 | | 2,4,5-T;2,4,5-trichlorophenoxyacetic acid Talc; see Silicates | -- | 10 | null | null | 2,4,5-T;2,4,5-trichlorophenoxyacetic acid Talc; see Silicates | https://referencesource.org/workplace-exposure-limits/2-4-5-t-2-4-5-trichlorophenoxyacetic-acid-talc-see-silicates/ | [
"cas_number",
"pel_mgm3",
"substance"
] | null | null |
93765 | null | 2-4-5-trichlorophenoxyacetic-acid-see-2-4-5-t | null | null | https://www.dir.ca.gov/title8/5155.html | 93765 | | 2,4,5-Trichlorophenoxyacetic acid see 2,4,5-T | null | null | 2,4,5-Trichlorophenoxyacetic acid see 2,4,5-T | https://referencesource.org/workplace-exposure-limits/2-4-5-trichlorophenoxyacetic-acid-see-2-4-5-t/ | [
"cas_number",
"substance"
] | null | null |
88891 | null | 2-4-6-trinitrophenol-see-picric-acid | null | null | https://www.dir.ca.gov/title8/5155.html | 88891 | | 2,4,6-Trinitrophenol; see Picric acid | null | null | 2,4,6-Trinitrophenol; see Picric acid | https://referencesource.org/workplace-exposure-limits/2-4-6-trinitrophenol-see-picric-acid/ | [
"cas_number",
"substance"
] | null | null |
479458 | null | 2-4-6-trinitrophenylmethyl-nitramine-see-tetryl | null | null | https://www.dir.ca.gov/title8/5155.html | 479458 | | 2,4,6-Trinitrophenylmethyl nitramine; see Tetryl | null | null | 2,4,6-Trinitrophenylmethyl nitramine; see Tetryl | https://referencesource.org/workplace-exposure-limits/2-4-6-trinitrophenylmethyl-nitramine-see-tetryl/ | [
"cas_number",
"substance"
] | null | null |
118-96-7 | null | 2-4-6-trinitrotoluene-tnt | 1.5 | null | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 2,4,6-Trinitrotoluene (TNT) | 118-96-7 | - | 1.5 | X | | null | null | 2,4,6-Trinitrotoluene (TNT) | https://referencesource.org/workplace-exposure-limits/2-4-6-trinitrotoluene-tnt/ | [
"cas_number",
"pel_mgm3",
"substance"
] | null | null |
118967 | null | 2-4-6-trinitrotoluene-tnt-2 | 0.5 | null | https://www.dir.ca.gov/title8/5155.html | 118967 | S | 2,4,6-Trinitrotoluene; TNT | -- | 0.5 | null | null | 2,4,6-Trinitrotoluene; TNT | https://referencesource.org/workplace-exposure-limits/2-4-6-trinitrotoluene-tnt-2/ | [
"cas_number",
"pel_mgm3",
"substance"
] | null | null |
94757 | [] | 2-4-d-2-4-dichlorophenoxyacetic-acid | 10 | null | https://www.dir.ca.gov/title8/5155.html | 94757 | | 2,4-D;2,4-dichlorophenoxyacetic acid | -- | 10 | null | null | 2,4-D;2,4-dichlorophenoxyacetic acid | https://referencesource.org/workplace-exposure-limits/2-4-d-2-4-dichlorophenoxyacetic-acid/ | [
"cas_number",
"pel_mgm3",
"substance"
] | null | null |
25321146 | [
{
"field": "pel_mgm3",
"versions": [
{
"as_of": "2026-08-05T00:00:00",
"source": "https://www.dir.ca.gov/title8/5155.html",
"source_quote": "25321146 | S | 2,4-Dinitrotoluene | -- | 0.15",
"value": "0.15"
},
{
"as_of": "2026-08-05T00:00:00",
... | 2-4-dinitrotoluene | 0.15 | null | https://www.dir.ca.gov/title8/5155.html | 25321146 | S | 2,4-Dinitrotoluene | -- | 0.15 | null | null | 2,4-Dinitrotoluene | https://referencesource.org/workplace-exposure-limits/2-4-dinitrotoluene/ | [
"cas_number",
"pel_mgm3",
"substance"
] | null | null |
128370 | null | 2-6-di-tert-butyl-p-cresol | 10 | null | https://www.dir.ca.gov/title8/5155.html | 128370 | | 2,6-Di-tert-butyl-p-cresol | -- | 10 | null | null | 2,6-Di-tert-butyl-p-cresol | https://referencesource.org/workplace-exposure-limits/2-6-di-tert-butyl-p-cresol/ | [
"cas_number",
"pel_mgm3",
"substance"
] | null | null |
108838 | null | 2-6-dimethyl-4-heptanone-see-diisobutyl-ketone | null | null | https://www.dir.ca.gov/title8/5155.html | 108838 | | 2,6-Dimethyl-4-heptanone; see Diisobutyl ketone | null | null | 2,6-Dimethyl-4-heptanone; see Diisobutyl ketone | https://referencesource.org/workplace-exposure-limits/2-6-dimethyl-4-heptanone-see-diisobutyl-ketone/ | [
"cas_number",
"substance"
] | null | null |
53963 | [] | 2-acetylaminofluorene-n-fluoren-2-yl-acetamide-see-section-5209 | null | null | https://www.dir.ca.gov/title8/5155.html | 53963 | S | 2-Acetylaminofluorene; N-fluoren-2-yl acetamide; see Section 5209 | null | null | 2-Acetylaminofluorene; N-fluoren-2-yl acetamide; see Section 5209 | https://referencesource.org/workplace-exposure-limits/2-acetylaminofluorene-n-fluoren-2-yl-acetamide-see-section-5209/ | [
"cas_number",
"substance"
] | null | null |
141435 | null | 2-aminoethanol-see-ethanolamine | null | null | https://www.dir.ca.gov/title8/5155.html | 141435 | | 2-Aminoethanol; see Ethanolamine | null | null | 2-Aminoethanol; see Ethanolamine | https://referencesource.org/workplace-exposure-limits/2-aminoethanol-see-ethanolamine/ | [
"cas_number",
"substance"
] | null | null |
91598 | null | 2-aminonapthalene-see-beta-naphthylamine-section-5209 | null | null | https://www.dir.ca.gov/title8/5155.html | 91598 | | 2-Aminonapthalene; see beta-Naphthylamine, Section 5209 | null | null | 2-Aminonapthalene; see beta-Naphthylamine, Section 5209 | https://referencesource.org/workplace-exposure-limits/2-aminonapthalene-see-beta-naphthylamine-section-5209/ | [
"cas_number",
"substance"
] | null | null |
504-29-0 | [] | 2-aminopyridine | 2 | 0.5 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 2-Aminopyridine | 504-29-0 | 0.5 | 2 | - | | null | null | 2-Aminopyridine | https://referencesource.org/workplace-exposure-limits/2-aminopyridine/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
78-93-3 | null | 2-butanone-methyl-ethyl-ketone | 590 | 200 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 2-Butanone (Methyl ethyl ketone) | 78-93-3 | 200 | 590 | - | | null | null | 2-Butanone (Methyl ethyl ketone) | https://referencesource.org/workplace-exposure-limits/2-butanone-methyl-ethyl-ketone/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
78933 | null | 2-butanone-see-methyl-ethyl-ketone | null | null | https://www.dir.ca.gov/title8/5155.html | 78933 | | 2-Butanone; see Methyl ethyl ketone | null | null | 2-Butanone; see Methyl ethyl ketone | https://referencesource.org/workplace-exposure-limits/2-butanone-see-methyl-ethyl-ketone/ | [
"cas_number",
"substance"
] | null | null |
111-76-2 | null | 2-butoxyethanol | 240 | 50 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 2-Butoxyethanol | 111-76-2 | 50 | 240 | X | | null | null | 2-Butoxyethanol | https://referencesource.org/workplace-exposure-limits/2-butoxyethanol/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
111762 | null | 2-butoxyethanol-egbe | 97 | 20 | https://www.dir.ca.gov/title8/5155.html | 111762 | S | 2-Butoxyethanol (EGBE) | 20 | 97 | null | null | 2-Butoxyethanol (EGBE) | https://referencesource.org/workplace-exposure-limits/2-butoxyethanol-egbe/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
126998 | null | 2-chloro-1-3-butadiene-see-chloroprene | null | null | https://www.dir.ca.gov/title8/5155.html | 126998 | S | 2-Chloro-1,3-butadiene; see Chloroprene | null | null | 2-Chloro-1,3-butadiene; see Chloroprene | https://referencesource.org/workplace-exposure-limits/2-chloro-1-3-butadiene-see-chloroprene/ | [
"cas_number",
"substance"
] | null | null |
1929-82-4 | null | 2-chloro-6-trichloromethyl-pyridine | null | null | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 2-Chloro-6-(trichloromethyl) pyridine | 1929-82-4 | - | - | - | | null | null | 2-Chloro-6-(trichloromethyl) pyridine | https://referencesource.org/workplace-exposure-limits/2-chloro-6-trichloromethyl-pyridine/ | [
"cas_number",
"substance"
] | null | null |
1929824 | null | 2-chloro-6-trichloromethyl-pyridine-see-nitrapyrin | null | null | https://www.dir.ca.gov/title8/5155.html | 1929824 | | 2-Chloro-6-(trichloromethyl)pyridine; see Nitrapyrin | -- | null | null | 2-Chloro-6-(trichloromethyl)pyridine; see Nitrapyrin | https://referencesource.org/workplace-exposure-limits/2-chloro-6-trichloromethyl-pyridine-see-nitrapyrin/ | [
"cas_number",
"substance"
] | null | null |
107073 | null | 2-chloroethanol-see-ethylene-chlorohydrin | null | null | https://www.dir.ca.gov/title8/5155.html | 107073 | | 2-Chloroethanol; see Ethylene chlorohydrin | null | null | 2-Chloroethanol; see Ethylene chlorohydrin | https://referencesource.org/workplace-exposure-limits/2-chloroethanol-see-ethylene-chlorohydrin/ | [
"cas_number",
"substance"
] | null | null |
598787 | null | 2-chloropropionic-acid | 0.44 | 0.1 | https://www.dir.ca.gov/title8/5155.html | 598787 | S | 2-Chloropropionic acid | 0.1 | 0.44 | null | null | 2-Chloropropionic acid | https://referencesource.org/workplace-exposure-limits/2-chloropropionic-acid/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
100378 | [
{
"field": "pel_ppm",
"versions": [
{
"as_of": "2026-08-05T00:00:00",
"source": "https://www.dir.ca.gov/title8/5155.html",
"source_quote": "100378 | S | 2-(Diethylamino) ethanol | 2 | 9.6",
"value": "2"
},
{
"as_of": "2026-08-05T00:00:00",
"s... | 2-diethylamino-ethanol | 9.6 | 2 | https://www.dir.ca.gov/title8/5155.html | 100378 | S | 2-(Diethylamino) ethanol | 2 | 9.6 | null | null | 2-(Diethylamino) ethanol | https://referencesource.org/workplace-exposure-limits/2-diethylamino-ethanol/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
110805 | null | 2-ethoxyethanol | 18 | 5 | https://www.dir.ca.gov/title8/5155.html | 110805 | S | 2-Ethoxyethanol | 5 | 18 | null | null | 2-Ethoxyethanol | https://referencesource.org/workplace-exposure-limits/2-ethoxyethanol/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
110-80-5 | null | 2-ethoxyethanol-cellosolve | 740 | 200 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 2-Ethoxyethanol (Cellosolve) | 110-80-5 | 200 | 740 | X | | null | null | 2-Ethoxyethanol (Cellosolve) | https://referencesource.org/workplace-exposure-limits/2-ethoxyethanol-cellosolve/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
111159 | [
{
"field": "pel_ppm",
"versions": [
{
"as_of": "2026-08-05T00:00:00",
"source": "https://www.dir.ca.gov/title8/5155.html",
"source_quote": "111159 | S | 2-Ethoxyethyl acetate | 5 | 27",
"value": "5"
},
{
"as_of": "2026-08-05T00:00:00",
"sourc... | 2-ethoxyethyl-acetate | 27 | 5 | https://www.dir.ca.gov/title8/5155.html | 111159 | S | 2-Ethoxyethyl acetate | 5 | 27 | null | null | 2-Ethoxyethyl acetate | https://referencesource.org/workplace-exposure-limits/2-ethoxyethyl-acetate/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
591-78-6 | null | 2-hexanone-methyl-n-butyl-ketone | 410 | 100 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 2-Hexanone (Methyl n-butyl ketone) | 591-78-6 | 100 | 410 | - | | null | null | 2-Hexanone (Methyl n-butyl ketone) | https://referencesource.org/workplace-exposure-limits/2-hexanone-methyl-n-butyl-ketone/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
591786 | null | 2-hexanone-see-methyl-butyl-ketone | null | null | https://www.dir.ca.gov/title8/5155.html | 591786 | | 2-Hexanone; see Methyl butyl ketone | null | null | 2-Hexanone; see Methyl butyl ketone | https://referencesource.org/workplace-exposure-limits/2-hexanone-see-methyl-butyl-ketone/ | [
"cas_number",
"substance"
] | null | null |
999611 | null | 2-hydroxypropyl-acrylate | 3 | 0.5 | https://www.dir.ca.gov/title8/5155.html | 999611 | S | 2-Hydroxypropyl acrylate | 0.5 | 3 | null | null | 2-Hydroxypropyl acrylate | https://referencesource.org/workplace-exposure-limits/2-hydroxypropyl-acrylate/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
109864 | null | 2-methoxyethanol | 16 | 5 | https://www.dir.ca.gov/title8/5155.html | 109864 | S | 2-Methoxyethanol | 5 | 16 | null | null | 2-Methoxyethanol | https://referencesource.org/workplace-exposure-limits/2-methoxyethanol/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
109-86-4 | null | 2-methoxyethanol-methyl-cellosolve | 80 | 25 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 2-Methoxyethanol (Methyl cellosolve) | 109-86-4 | 25 | 80 | X | | null | null | 2-Methoxyethanol (Methyl cellosolve) | https://referencesource.org/workplace-exposure-limits/2-methoxyethanol-methyl-cellosolve/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
110496 | null | 2-methoxyethyl-acetate | 24 | 5 | https://www.dir.ca.gov/title8/5155.html | 110496 | | 2-Methoxyethyl acetate | 5 | 24 | null | null | 2-Methoxyethyl acetate | https://referencesource.org/workplace-exposure-limits/2-methoxyethyl-acetate/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
110-49-6 | null | 2-methoxyethyl-acetate-methyl-cellosolve-acetate | 120 | 25 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 2-Methoxyethyl acetate (Methyl cellosolve acetate) | 110-49-6 | 25 | 120 | X | | null | null | 2-Methoxyethyl acetate (Methyl cellosolve acetate) | https://referencesource.org/workplace-exposure-limits/2-methoxyethyl-acetate-methyl-cellosolve-acetate/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
624419 | null | 2-methylbutyl-acetate-see-pentyl-acetate | null | null | https://www.dir.ca.gov/title8/5155.html | 624419 | | 2-Methylbutyl acetate; see Pentyl acetate | null | null | 2-Methylbutyl acetate; see Pentyl acetate | https://referencesource.org/workplace-exposure-limits/2-methylbutyl-acetate-see-pentyl-acetate/ | [
"cas_number",
"substance"
] | null | null |
12108133 | null | 2-methylcyclopentadienyl-manganese-tricarbonyl-as-mn | 0.2 | null | https://www.dir.ca.gov/title8/5155.html | 12108133 | S | 2-Methylcyclopentadienyl manganese tricarbonyl, as Mn | -- | 0.2 | null | null | 2-Methylcyclopentadienyl manganese tricarbonyl, as Mn | https://referencesource.org/workplace-exposure-limits/2-methylcyclopentadienyl-manganese-tricarbonyl-as-mn/ | [
"cas_number",
"pel_mgm3",
"substance"
] | null | null |
102818 | null | 2-n-dibutylaminoethanol | 14 | 2 | https://www.dir.ca.gov/title8/5155.html | 102818 | S | 2-N-Dibutylaminoethanol | 2 | 14 | null | null | 2-N-Dibutylaminoethanol | https://referencesource.org/workplace-exposure-limits/2-n-dibutylaminoethanol/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
79-46-9 | [
{
"field": "pel_ppm",
"versions": [
{
"as_of": "2026-08-05T00:00:00",
"source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1",
"source_quote": "2-Nitropropane | 79-46-9 | 25 | 90 | - |",
"value": "25"
},
{
"as_of":... | 2-nitropropane | 90 | 25 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 2-Nitropropane | 79-46-9 | 25 | 90 | - | | null | null | 2-Nitropropane | https://referencesource.org/workplace-exposure-limits/2-nitropropane/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
107-87-9 | null | 2-pentanone-methyl-propyl-ketone | 700 | 200 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 2-Pentanone (Methyl propyl ketone) | 107-87-9 | 200 | 700 | - | | null | null | 2-Pentanone (Methyl propyl ketone) | https://referencesource.org/workplace-exposure-limits/2-pentanone-methyl-propyl-ketone/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
107879 | null | 2-pentanone-see-methyl-propyl-ketone | null | null | https://www.dir.ca.gov/title8/5155.html | 107879 | | 2-Pentanone; see Methyl propyl ketone | null | null | 2-Pentanone; see Methyl propyl ketone | https://referencesource.org/workplace-exposure-limits/2-pentanone-see-methyl-propyl-ketone/ | [
"cas_number",
"substance"
] | null | null |
91941 | [] | 3-3-dichlorobenzidine-4-4-diamino-3-3-dichlorobiphenyl-see-section-5209 | null | null | https://www.dir.ca.gov/title8/5155.html | 91941 | S | 3,3'-Dichlorobenzidine; 4,4'-diamino-3,3'-dichlorobiphenyl; see Section 5209 | null | null | 3,3'-Dichlorobenzidine; 4,4'-diamino-3,3'-dichlorobiphenyl; see Section 5209 | https://referencesource.org/workplace-exposure-limits/3-3-dichlorobenzidine-4-4-diamino-3-3-dichlorobiphenyl-see-section-5209/ | [
"cas_number",
"substance"
] | null | null |
620111 | null | 3-amyl-acetate-see-pentyl-acetate | null | null | https://www.dir.ca.gov/title8/5155.html | 620111 | | 3-Amyl acetate; see Pentyl acetate | null | null | 3-Amyl acetate; see Pentyl acetate | https://referencesource.org/workplace-exposure-limits/3-amyl-acetate-see-pentyl-acetate/ | [
"cas_number",
"substance"
] | null | null |
101144 | null | 4-4-methylene-bis-2-chloroaniline-see-also-section-5215 | 0.01 | null | https://www.dir.ca.gov/title8/5155.html | 101144 | S | 4,4′-Methylene bis(2-chloroaniline), see also Section 5215 | -- | 0.01 | null | null | 4,4′-Methylene bis(2-chloroaniline), see also Section 5215 | https://referencesource.org/workplace-exposure-limits/4-4-methylene-bis-2-chloroaniline-see-also-section-5215/ | [
"cas_number",
"pel_mgm3",
"substance"
] | null | null |
101779 | null | 4-4-methylene-dianiline-mda-see-also-sections-1535-5200 | 0.08 | 0.01 | https://www.dir.ca.gov/title8/5155.html | 101779 | S | 4,4′-Methylene dianiline; MDA (see also Sections 1535 & 5200) | 0.01 | 0.08 | | 0.1 | 0.8 | 0.8 | 0.1 | 4,4′-Methylene dianiline; MDA (see also Sections 1535 & 5200) | https://referencesource.org/workplace-exposure-limits/4-4-methylene-dianiline-mda-see-also-sections-1535-5200/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"stel_mgm3",
"stel_ppm",
"substance"
] | null | null |
96-69-5 | [] | 4-4-thiobis-6-tert-butyl-m-cresol | null | null | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 4,4′-Thiobis (6-tert, Butyl-m-cresol) | 96-69-5 | - | - | - | | null | null | 4,4′-Thiobis (6-tert, Butyl-m-cresol) | https://referencesource.org/workplace-exposure-limits/4-4-thiobis-6-tert-butyl-m-cresol/ | [
"cas_number",
"substance"
] | null | null |
534521 | [] | 4-6-dinitro-o-cresol-2-methyl-4-6-dinitrophenol | 0.2 | null | https://www.dir.ca.gov/title8/5155.html | 534521 | S | 4,6-Dinitro-o-cresol; 2-methyl-4,6-dinitrophenol | -- | 0.2 | null | null | 4,6-Dinitro-o-cresol; 2-methyl-4,6-dinitrophenol | https://referencesource.org/workplace-exposure-limits/4-6-dinitro-o-cresol-2-methyl-4-6-dinitrophenol/ | [
"cas_number",
"pel_mgm3",
"substance"
] | null | null |
92-67-1 | [] | 4-aminodiphenyl-see-1910-1011 | null | null | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 4-Aminodiphenyl; see 1910.1011 | 92-67-1 | - | - | - | | null | null | 4-Aminodiphenyl; see 1910.1011 | https://referencesource.org/workplace-exposure-limits/4-aminodiphenyl-see-1910-1011/ | [
"cas_number",
"substance"
] | null | null |
60-11-7 | [] | 4-dimethylaminoazobenzene-see-1910-1015 | null | null | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 4-Dimethylaminoazobenzene; see 1910.1015 | 60-11-7 | - | - | - | | null | null | 4-Dimethylaminoazobenzene; see 1910.1015 | https://referencesource.org/workplace-exposure-limits/4-dimethylaminoazobenzene-see-1910-1015/ | [
"cas_number",
"substance"
] | null | null |
150765 | null | 4-methoxyphenol | 5 | null | https://www.dir.ca.gov/title8/5155.html | 150765 | | 4-Methoxyphenol | -- | 5 | null | null | 4-Methoxyphenol | https://referencesource.org/workplace-exposure-limits/4-methoxyphenol/ | [
"cas_number",
"pel_mgm3",
"substance"
] | null | null |
92-93-3 | [] | 4-nitrodiphenyl-see-1910-1003 | null | null | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | 4-Nitrodiphenyl; see 1910.1003 | 92-93-3 | - | - | - | | null | null | 4-Nitrodiphenyl; see 1910.1003 | https://referencesource.org/workplace-exposure-limits/4-nitrodiphenyl-see-1910-1003/ | [
"cas_number",
"substance"
] | null | null |
100403 | null | 4-vinyl-cyclohexene | 0.4 | 0.1 | https://www.dir.ca.gov/title8/5155.html | 100403 | S | 4-Vinyl cyclohexene | 0.1 | 0.4 | null | null | 4-Vinyl cyclohexene | https://referencesource.org/workplace-exposure-limits/4-vinyl-cyclohexene/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
532-27-4 | [] | a-chloroacetophenone-phenacyl-chloride | 0.3 | 0.05 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | a-Chloroacetophenone (Phenacyl chloride) | 532-27-4 | 0.05 | 0.3 | - | | null | null | a-Chloroacetophenone (Phenacyl chloride) | https://referencesource.org/workplace-exposure-limits/a-chloroacetophenone-phenacyl-chloride/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | null | null |
75-07-0 | [
{
"field": "pel_ppm",
"versions": [
{
"as_of": "2026-08-05T00:00:00",
"source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1",
"source_quote": "Acetaldehyde | 75-07-0 | 200 | 360 | - |",
"value": "200"
},
{
"as_of"... | acetaldehyde | 360 | 200 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | Acetaldehyde | 75-07-0 | 200 | 360 | - | | null | null | Acetaldehyde | https://referencesource.org/workplace-exposure-limits/acetaldehyde/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | [
{
"as_of": "2026-08-05T00:00:00",
"field": "ceiling",
"source": "https://www.dir.ca.gov/title8/5155.html",
"source_quote": "75070 | | Acetaldehyde | 25 | 45 | C",
"value": "C"
}
] | null |
64-19-7 | [] | acetic-acid | 25 | 10 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | Acetic acid | 64-19-7 | 10 | 25 | - | | null | null | Acetic acid | https://referencesource.org/workplace-exposure-limits/acetic-acid/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | [
{
"as_of": "2026-08-05T00:00:00",
"field": "ceiling",
"source": "https://www.dir.ca.gov/title8/5155.html",
"source_quote": "64197 | | Acetic acid | 10 | 25 | 40 ppm | 15 | 37",
"value": "40 ppm"
},
{
"as_of": "2026-08-05T00:00:00",
"field": "stel_ppm",
"source": "https://www.dir.... | null |
108-24-7 | [] | acetic-anhydride | 20 | 5 | https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 | Acetic anhydride | 108-24-7 | 5 | 20 | - | | null | null | Acetic anhydride | https://referencesource.org/workplace-exposure-limits/acetic-anhydride/ | [
"cas_number",
"pel_mgm3",
"pel_ppm",
"substance"
] | [
{
"as_of": "2026-08-05T00:00:00",
"field": "ceiling",
"source": "https://www.dir.ca.gov/title8/5155.html",
"source_quote": "108247 | | Acetic Anhydride | 5 | 20 | C",
"value": "C"
}
] | null |
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