Rulebook › 49 CFR Part 172
PART 172—HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE INFORMATION, TRAINING REQUIREMENTS, AND SECURITY PLANS
Official text from the eCFR, current as of 2026-10-22. View this part on eCFR.gov
Subpart A—General
Subpart B—Table of Hazardous Materials and Special Provisions
Subpart C—Shipping Papers
- § 172.200 Applicability.
- § 172.201 Preparation and retention of shipping papers.
- § 172.202 Description of hazardous material on shipping papers.
- § 172.203 Additional description requirements.
- § 172.204 Shipper's certification.
- § 172.205 Hazardous waste manifest.
Subpart D—Marking
- § 172.300 Applicability.
- § 172.301 General marking requirements for non-bulk packagings.
- § 172.302 General marking requirements for bulk packagings.
- § 172.303 Prohibited marking.
- § 172.304 Marking requirements.
- § 172.306 [Reserved]
- § 172.308 Authorized abbreviations.
- § 172.310 Class 7 (radioactive) materials.
- § 172.312 Liquid hazardous materials in non-bulk packagings.
- § 172.313 Poisonous hazardous materials.
- § 172.315 Limited quantities.
- § 172.316 [Reserved]
- § 172.317 KEEP AWAY FROM HEAT handling mark.
- § 172.320 Explosive hazardous materials.
- § 172.322 Marine pollutants.
- § 172.323 Infectious substances.
- § 172.324 Hazardous substances in non-bulk packagings.
- § 172.325 Elevated temperature materials.
- § 172.326 Portable tanks.
- § 172.327 Petroleum sour crude oil in bulk packaging.
- § 172.328 Cargo tanks.
- § 172.330 Tank cars and multi-unit tank car tanks.
- § 172.331 Bulk packagings other than portable tanks, cargo tanks, tank cars and multi-unit tank car tanks.
- § 172.332 Identification number markings.
- § 172.334 Identification numbers; prohibited display.
- § 172.336 Identification numbers; special provisions.
- § 172.338 Replacement of identification numbers.
Subpart E—Labeling
- § 172.400 General labeling requirements.
- § 172.400a Exceptions from labeling.
- § 172.401 Prohibited labeling.
- § 172.402 Additional labeling requirements.
- § 172.403 Class 7 (radioactive) material.
- § 172.404 Labels for mixed and consolidated packaging.
- § 172.405 Authorized label modifications.
- § 172.406 Placement of labels.
- § 172.407 Label specifications.
- § 172.411 EXPLOSIVE 1.1, 1.2, 1.3, 1.4, 1.5 and 1.6 labels, and EXPLOSIVE Subsidiary label.
- § 172.415 NON-FLAMMABLE GAS label.
- § 172.416 POISON GAS label.
- § 172.417 FLAMMABLE GAS label.
- § 172.419 FLAMMABLE LIQUID label.
- § 172.420 FLAMMABLE SOLID label.
- § 172.422 SPONTANEOUSLY COMBUSTIBLE label.
- § 172.423 DANGEROUS WHEN WET label.
- § 172.426 OXIDIZER label.
- § 172.427 ORGANIC PEROXIDE label.
- § 172.429 POISON INHALATION HAZARD label.
- § 172.430 POISON label.
- § 172.431 [Reserved]
- § 172.432 INFECTIOUS SUBSTANCE label.
- § 172.436 RADIOACTIVE WHITE-I label.
- § 172.438 RADIOACTIVE YELLOW-II label.
- § 172.440 RADIOACTIVE YELLOW-III label.
- § 172.441 FISSILE label.
- § 172.442 CORROSIVE label.
- § 172.444 [Reserved]
- § 172.446 CLASS 9 label.
- § 172.447 LITHIUM BATTERY label.
- § 172.448 CARGO AIRCRAFT ONLY label.
- § 172.450 EMPTY label.
Subpart F—Placarding
- § 172.500 Applicability of placarding requirements.
- § 172.502 Prohibited and permissive placarding.
- § 172.503 Identification number display on placards.
- § 172.504 General placarding requirements.
- § 172.505 Placarding for subsidiary hazards.
- § 172.506 Providing and affixing placards: Highway.
- § 172.507 Special placarding provisions: Highway.
- § 172.508 Placarding and affixing placards: Rail.
- § 172.510 Special placarding provisions: Rail.
- § 172.512 Freight containers and aircraft unit load devices.
- § 172.514 Bulk packagings.
- § 172.516 Visibility and display of placards.
- § 172.519 General specifications for placards.
- § 172.521 DANGEROUS placard.
- § 172.522 EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES 1.3 placards.
- § 172.523 EXPLOSIVES 1.4 placard.
- § 172.524 EXPLOSIVES 1.5 placard.
- § 172.525 EXPLOSIVES 1.6 placard.
- § 172.526 [Reserved]
- § 172.527 Background requirements for certain placards.
- § 172.528 NON-FLAMMABLE GAS placard.
- § 172.530 OXYGEN placard.
- § 172.532 FLAMMABLE GAS placard.
- § 172.536 [Reserved]
- § 172.540 POISON GAS placard.
- § 172.542 FLAMMABLE placard.
- § 172.544 COMBUSTIBLE placard.
- § 172.546 FLAMMABLE SOLID placard.
- § 172.547 SPONTANEOUSLY COMBUSTIBLE placard.
- § 172.548 DANGEROUS WHEN WET placard.
- § 172.550 OXIDIZER placard.
- § 172.552 ORGANIC PEROXIDE placard.
- § 172.553 [Reserved]
- § 172.554 POISON placard.
- § 172.555 POISON INHALATION HAZARD placard.
- § 172.556 RADIOACTIVE placard.
- § 172.558 CORROSIVE placard.
- § 172.560 CLASS 9 placard.
Subpart G—Emergency Response Information
- § 172.600 Applicability and general requirements.
- § 172.602 Emergency response information.
- § 172.604 Emergency response telephone number.
- § 172.606 Carrier information contact.
Subpart H—Training
- § 172.700 Purpose and scope.
- § 172.701 Federal-State relationship.
- § 172.702 Applicability and responsibility for training and testing.
- § 172.704 Training requirements.
Subpart I—Safety and Security Plans
- § 172.800 Purpose and applicability.
- § 172.802 Components of a security plan.
- § 172.804 Relationship to other Federal requirements.
- § 172.820 Additional planning requirements for transportation by rail.
- § 172.822 Limitation on actions by states, local governments, and Indian tribes.
Sections
- § Appendix A to Part 172 Appendix A to Part 172—Office of Hazardous Materials Transportation Color Tolerance Charts and Tables
- § Appendix B to Part 172 Appendix B to Part 172—Trefoil Symbol
- § Appendix C to Part 172 Appendix C to Part 172—Dimensional Specifications for Recommended Placard Holder
- § Appendix D to Part 172 Appendix D to Part 172—Rail Risk Analysis Factors