Free · CC BY 4.0 · For the industry

Free hazmat compliance references.

PHMSA publishes the regulations. We publish the spreadsheets. Drivers, dispatchers, fleet safety leads, and compliance officers — everything we've made available, in one place. Free, CC BY 4.0, refreshed when PHMSA amends.

Want all four? Get the whole set — HMT, ERG, segregation, and Appendix A — in one ZIP. One email.
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DOT Hazmat Table

49 CFR § 172.101

The full Hazardous Materials Table, byte-verified against the eCFR HTML across all 14 columns: Symbols, PSN, Hazard Class, ID Number, PG, Label Codes, Special Provisions, Packaging, Quantity Limits, Vessel Stowage.

Entries3,003
Distinct IDs2,334
Snapshot2026-05-15
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2024 ERG UN→Guide Lookup

PHMSA Emergency Response Guidebook

The yellow-pages UN/NA → guide-number index from the official 2024 ERG, plus guide reference for every populated guide. Includes a Quick Lookup tab — type a UN number, get the guide instantly.

Entries1,982
Guides62 populated
Snapshot2026-05-27
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Segregation Matrix

49 CFR § 177.848

The full hazardous-materials segregation matrix — which hazard classes you can and can't load together — plus the legend, the §177.848(c) restrictions, and the Class 1 explosive compatibility table. Parsed from the authoritative eCFR, cross-checked against our engine.

Matrix18 × 18 classes
Sheets6
eCFR currency2026-04-20
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Appendix A · Hazardous Substances

49 CFR § 172.101 Appendix A

The CERCLA list of hazardous substances and their Reportable Quantities (RQs) — what triggers an EPA release notification — plus the radionuclide RQs. DOT hazard class is filled in where the substance name matches a DOT proper shipping name. Parsed from the authoritative eCFR.

Substances1,350 + 765 nuclides
Sheets4
eCFR currency2026-04-20
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CC BY 4.0
All resources licensed under Creative Commons Attribution 4.0 International. The underlying regulatory text is a US federal-government work and is in the public domain (17 U.S.C. § 105). The cleaning, verification, formatting, and structural metadata in each file are © 2026 HaulGuard AI LLC and released under CC BY 4.0. Use the files freely — please credit HaulGuard AI · haulguard.ai/free-resources.

How these are verified

Every entry in every file traces to its authoritative published source (eCFR HTML for 49 CFR data, the official PHMSA-published PDF for the 2024 ERG). Each file's About sheet records the source URL, snapshot date, and SHA-256 of the parsed data — so you can hash any file you download, compare it to the published source, and audit the verification chain end-to-end yourself.

Need more than reference data?

HaulGuard scans the Bill of Lading, generates the placards under § 172.504, checks segregation under § 177.848, and produces a tamper-evident audit trail your driver can present at inspection. The files above are inputs. The product is the engine.

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