Code of Federal Regulations > Title 49 > Chapter I > Part 172 > Subpart F - Subpart F—Placarding

U.S. Code of Federal Regulations

Regulations most recently checked for updates: Feb 11, 2026

§ 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.