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value | hazard_class stringlengths 1 18 | id stringlengths 1 55 | placard_design_section stringlengths 7 7 ⌀ | placard_name stringlengths 4 25 | placarding_threshold stringclasses 3
values | regulation stringclasses 1
value | source stringclasses 1
value | source_quote stringlengths 12 163 | url stringlengths 63 117 | verified_fields listlengths 4 8 | threshold_exception_scope stringclasses 1
value | threshold_quantity_rule stringclasses 1
value | class_qualifier stringclasses 5
values |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1.1 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 1.1 | 1-1 | 172.522 | EXPLOSIVES 1.1 | any quantity | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 1.1 | EXPLOSIVES 1.1 | 172.522 | https://referencesource.org/dot-hazmat-placarding-thresholds/1-1/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation"
] | null | null | null |
1.2 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 1.2 | 1-2 | 172.522 | EXPLOSIVES 1.2 | any quantity | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 1.2 | EXPLOSIVES 1.2 | 172.522 | https://referencesource.org/dot-hazmat-placarding-thresholds/1-2/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation"
] | null | null | null |
1.3 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 1.3 | 1-3 | 172.522 | EXPLOSIVES 1.3 | any quantity | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 1.3 | EXPLOSIVES 1.3 | 172.522 | https://referencesource.org/dot-hazmat-placarding-thresholds/1-3/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation"
] | null | null | null |
1.4 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 1.4 | 1-4 | 172.523 | EXPLOSIVES 1.4 | 1,001 lb (454 kg) aggregate gross weight | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 1.4 | EXPLOSIVES 1.4 | 172.523 | https://referencesource.org/dot-hazmat-placarding-thresholds/1-4/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation",
"threshold_exception_scope",
"threshold_quantity_rule"
] | when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required | A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2 | null |
1.5 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 1.5 | 1-5 | 172.524 | EXPLOSIVES 1.5 | 1,001 lb (454 kg) aggregate gross weight | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 1.5 | EXPLOSIVES 1.5 | 172.524 | https://referencesource.org/dot-hazmat-placarding-thresholds/1-5/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation",
"threshold_exception_scope",
"threshold_quantity_rule"
] | when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required | A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2 | null |
1.6 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 1.6 | 1-6 | 172.525 | EXPLOSIVES 1.6 | 1,001 lb (454 kg) aggregate gross weight | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 1.6 | EXPLOSIVES 1.6 | 172.525 | https://referencesource.org/dot-hazmat-placarding-thresholds/1-6/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation",
"threshold_exception_scope",
"threshold_quantity_rule"
] | when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required | A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2 | null |
2.1 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 2.1 | 2-1 | 172.532 | FLAMMABLE GAS | 1,001 lb (454 kg) aggregate gross weight | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 2.1 | FLAMMABLE GAS | 172.532 | https://referencesource.org/dot-hazmat-placarding-thresholds/2-1/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation",
"threshold_exception_scope",
"threshold_quantity_rule"
] | when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required | A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2 | null |
2.2 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 2.2 | 2-2 | 172.528 | NON-FLAMMABLE GAS | 1,001 lb (454 kg) aggregate gross weight | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 2.2 | NON-FLAMMABLE GAS | 172.528 | https://referencesource.org/dot-hazmat-placarding-thresholds/2-2/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation",
"threshold_exception_scope",
"threshold_quantity_rule"
] | when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required | A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2 | null |
2.3 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 2.3 | 2-3 | 172.540 | POISON GAS | any quantity | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 2.3 | POISON GAS | 172.540 | https://referencesource.org/dot-hazmat-placarding-thresholds/2-3/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation"
] | null | null | null |
3 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 3 | 3 | 172.542 | FLAMMABLE | 1,001 lb (454 kg) aggregate gross weight | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 3 | FLAMMABLE | 172.542 | https://referencesource.org/dot-hazmat-placarding-thresholds/3/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation",
"threshold_exception_scope",
"threshold_quantity_rule"
] | when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required | A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2 | null |
4.1 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 4.1 | 4-1 | 172.546 | FLAMMABLE SOLID | 1,001 lb (454 kg) aggregate gross weight | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 4.1 | FLAMMABLE SOLID | 172.546 | https://referencesource.org/dot-hazmat-placarding-thresholds/4-1/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation",
"threshold_exception_scope",
"threshold_quantity_rule"
] | when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required | A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2 | null |
4.2 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 4.2 | 4-2 | 172.547 | SPONTANEOUSLY COMBUSTIBLE | 1,001 lb (454 kg) aggregate gross weight | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 4.2 | SPONTANEOUSLY COMBUSTIBLE | 172.547 | https://referencesource.org/dot-hazmat-placarding-thresholds/4-2/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation",
"threshold_exception_scope",
"threshold_quantity_rule"
] | when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required | A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2 | null |
4.3 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 4.3 | 4-3 | 172.548 | DANGEROUS WHEN WET | any quantity | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 4.3 | DANGEROUS WHEN WET | 172.548 | https://referencesource.org/dot-hazmat-placarding-thresholds/4-3/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation"
] | null | null | null |
5.1 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 5.1 | 5-1 | 172.550 | OXIDIZER | 1,001 lb (454 kg) aggregate gross weight | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 5.1 | OXIDIZER | 172.550 | https://referencesource.org/dot-hazmat-placarding-thresholds/5-1/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation",
"threshold_exception_scope",
"threshold_quantity_rule"
] | when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required | A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2 | null |
5.2 — Organic peroxide, Type B, liquid or solid, temperature | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 5.2 | 5-2-organic-peroxide-type-b-liquid-or-solid-temperature | 172.552 | ORGANIC PEROXIDE | any quantity | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 5.2 (Organic peroxide, Type B, liquid or solid, temperature controlled) | ORGANIC PEROXIDE | 172.552 | https://referencesource.org/dot-hazmat-placarding-thresholds/5-2-organic-peroxide-type-b-liquid-or-solid-temperature/ | [
"class_qualifier",
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation"
] | null | null | Organic peroxide, Type B, liquid or solid, temperature controlled |
5.2 — Other than organic peroxide, Type B, liquid or solid | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 5.2 | 5-2-other-than-organic-peroxide-type-b-liquid-or-solid | 172.552 | ORGANIC PEROXIDE | 1,001 lb (454 kg) aggregate gross weight | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 5.2 (Other than organic peroxide, Type B, liquid or solid, temperature controlled) | ORGANIC PEROXIDE | 172.552 | https://referencesource.org/dot-hazmat-placarding-thresholds/5-2-other-than-organic-peroxide-type-b-liquid-or-solid/ | [
"class_qualifier",
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation",
"threshold_exception_scope",
"threshold_quantity_rule"
] | when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required | A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2 | Other than organic peroxide, Type B, liquid or solid, temperature controlled |
6.1 — material poisonous by | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 6.1 | 6-1-material-poisonous-by | 172.555 | POISON INHALATION HAZARD | any quantity | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 6.1 (material poisonous by inhalation (see <https://www.ecfr.gov/current/title-49/section-171.8> § 171.8 of this subchapter )) | POISON INHALATION HAZARD | 172.555 | https://referencesource.org/dot-hazmat-placarding-thresholds/6-1-material-poisonous-by/ | [
"class_qualifier",
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation"
] | null | null | material poisonous by inhalation |
6.1 — other than material poisonous by | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 6.1 | 6-1-other-than-material-poisonous-by | 172.554 | POISON | 1,001 lb (454 kg) aggregate gross weight | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 6.1 (other than material poisonous by inhalation) | POISON | 172.554 | https://referencesource.org/dot-hazmat-placarding-thresholds/6-1-other-than-material-poisonous-by/ | [
"class_qualifier",
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation",
"threshold_exception_scope",
"threshold_quantity_rule"
] | when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required | A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2 | other than material poisonous by inhalation |
6.2 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 6.2 | 6-2 | null | NONE | no placard specified for this class | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 6.2 | NONE | | https://referencesource.org/dot-hazmat-placarding-thresholds/6-2/ | [
"general_placarding_rule",
"hazard_class",
"placard_name",
"regulation"
] | null | null | null |
7 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 7 | 7 | 172.556 | RADIOACTIVE | any quantity | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 7 (Radioactive Yellow III label only) | RADIOACTIVE 1 | 172.556 | https://referencesource.org/dot-hazmat-placarding-thresholds/7/ | [
"class_qualifier",
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation"
] | null | null | Radioactive Yellow III label only |
8 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 8 | 8 | 172.558 | CORROSIVE | 1,001 lb (454 kg) aggregate gross weight | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 8 | CORROSIVE | 172.558 | https://referencesource.org/dot-hazmat-placarding-thresholds/8/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation",
"threshold_exception_scope",
"threshold_quantity_rule"
] | when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required | A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2 | null |
9 | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | 9 | 9 | 172.560 | CLASS 9 | 1,001 lb (454 kg) aggregate gross weight | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | 9 | CLASS 9 (see <https://www.ecfr.gov/current/title-49/section-172.504#p-172.504(f)(9)> § 172.504(f)(9) ) | 172.560 | https://referencesource.org/dot-hazmat-placarding-thresholds/9/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation",
"threshold_exception_scope",
"threshold_quantity_rule"
] | when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required | A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2 | null |
Combustible liquid | [
"category",
"placarding_threshold"
] | Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section | Combustible liquid | combustible-liquid | 172.544 | COMBUSTIBLE | 1,001 lb (454 kg) aggregate gross weight | § 172.504 General placarding requirements. | https://www.ecfr.gov/current/title-49/section-172.504 | Combustible liquid | COMBUSTIBLE | 172.544 | https://referencesource.org/dot-hazmat-placarding-thresholds/combustible-liquid/ | [
"general_placarding_rule",
"hazard_class",
"placard_design_section",
"placard_name",
"regulation",
"threshold_exception_scope",
"threshold_quantity_rule"
] | when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required | A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2 | null |
DOT hazmat placarding requirements by hazard class (any-quantity vs. 1,001 lb threshold)
Canonical, always-current version: https://referencesource.org/dot-hazmat-placarding-thresholds/ Machine-readable: https://referencesource.org/dot-hazmat-placarding-thresholds/data.json — this mirror is a point-in-time copy.
- Last verified: 2026-08-19
- Stale after: 2027-02-15 (past this date, prefer the canonical copy — it re-verifies on a cadence this snapshot does not)
- Records: 23
A shipment of hazardous material must be placarded on the transport vehicle, and which placard applies -- and whether it is required at any quantity or only once the aggregate gross weight of that class crosses 1,001 lb (454 kg) -- is fixed by two tables in one regulation, 49 CFR 172.504(e). Table 1's eight categories (explosives 1.1-1.3, poison gas, dangerous-when-wet, temperature-controlled organic peroxide, poison-inhalation-hazard, radioactive) require the named placard regardless of quantity. Table 2's fifteen require it only above 1,001 lb -- but that exception is a highway/rail exception that does not reach bulk packagings, which need a placard at any quantity, so every record carries the general rule and the exception's own scope alongside the number. Each record is one hazard-class / placard pairing. Answers 'do I need to placard this shipment', 'how much of this hazard class triggers a placard', 'which placard goes with hazard class 5.1'.
Provenance — what every record carries
Every record carries source (the URL the value was read from) and
source_quote (a verbatim quote from that page stating it). A value you
cannot check against its page is indistinguishable from an invented one;
these can all be checked. Each record is also individually addressable on
the canonical site at its url.
Licence position
US federal regulation — 17 USC 105, no copyright
Facts are not copyrightable; what this dataset takes from each source is a fact plus a short attributed quote linking back to the page that states it.
Sources
Fields
See any record in data/records.jsonl — field names are self-describing,
and the canonical page for each record renders them with labels:
https://referencesource.org/dot-hazmat-placarding-thresholds/
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