49 CFR 173.2 - Hazardous materials classes and index to hazard class definitions.

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§ 173.2 Hazardous materials classes and index to hazard class definitions.
The hazard class of a hazardous material is indicated either by its class (or division) number, its class name, or by the letters “ORM-D”. The following table lists class numbers, division numbers, class or division names and those sections of this subchapter which contain definitions for classifying hazardous materials, including forbidden materials.
Class No. Division No. (if any) Name of class or division 49 CFR reference for definitions
None Forbidden materials 173.21
None Forbidden explosives 173.54
1 1.1 Explosives (with a mass explosion hazard) 173.50
1 1.2 Explosives (with a projection hazard) 173.50
1 1.3 Explosives (with predominately a fire hazard) 173.50
1 1.4 Explosives (with no significant blast hazard) 173.50
1 1.5 Very insensitive explosives; blasting agents 173.50
1 1.6 Extremely insensitive detonating substances 173.50
2 2.1 Flammable gas 173.115
2 2.2 Non-flammable compressed gas 173.115
2 2.3 Poisonous gas 173.115
3 Flammable and combustible liquid 173.120
4 4.1 Flammable solid 173.124
4 4.2 Spontaneously combustible material 173.124
4 4.3 Dangerous when wet material 173.124
5 5.1 Oxidizer 173.127
5 5.2 Organic peroxide 173.128
6 6.1 Poisonous materials 173.132
6 6.2 Infectious substance (Etiologic agent) 173.134
7 Radioactive material 173.403
8 Corrosive material 173.136
9 Miscellaneous hazardous material 173.140
None Other regulated material: ORM-D 173.144
[Amdt. 173-224, 55 FR 52606, Dec. 21, 1990, as amended at 57 FR 45460, Oct. 1, 1992; Amdt. 173-234, 58 FR 51531, Oct. 1, 1993]

Title 49 published on 2015-12-03

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  • 2017-01-17; vol. 82 # 10 - Tuesday, January 17, 2017
    1. 82 FR 4796 - Civil Monetary Penalties—2017 Adjustment
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      SURFACE TRANSPORTATION BOARD
      Final rule.
      This final rule is effective January 17, 2017, and is applicable beginning January 13, 2017.
      49 CFR Part 1022
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Title 49 published on 2015-12-03.

The following are only the Rules published in the Federal Register after the published date of Title 49.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

* Only displaying the most recent 50 entries for Title 49. Please, view a Part for the full list of changes within that Part.

  • 2017-01-17; vol. 82 # 10 - Tuesday, January 17, 2017
    1. 82 FR 4796 - Civil Monetary Penalties—2017 Adjustment
      GPO FDSys: XML | Text
      SURFACE TRANSPORTATION BOARD
      Final rule.
      This final rule is effective January 17, 2017, and is applicable beginning January 13, 2017.
      49 CFR Part 1022