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The material is forbidden from being offered for transportation according to 49CFR 172.101 of this subchapter or 49CFR 173.21; The Associate Administrator for Hazardous Materials Safety has determined that the material does not present a hazard which is associated with a Division 5.2 material; or; The material meets one of the following conditions:
The package testing is based on the packing group (hazard level) of the contents, the quantity of material, and the type of container. The UN recommendations are implemented by regulatory bodies in each country: Transport Canada, United States Department of Transportation, [3] etc. Some carriers have additional requirements.
Note 2: A liquid in Division 6.1 meeting criteria for Packing Group I, Hazard Zones A or B stated in paragraph (a)(2) of this section is a material poisonous by inhalation subject to the additional hazard communication requirements in 49CFR 172.203(m)(3), 49CFR 172.313 and Table 1 of 49CFR 172.504(e) of this subchapter.
The placard displays UN number 1129, indicating butyraldehyde, as well as the pictogram for a flammable liquid. [27] Materials on Table 2, which is all other hazardous materials not in Table 1, [j] must display placard if 1,001 pounds (454 kg) or more of the material is loaded into a vehicle. If 1,000 pounds (450 kg) or less of a Table 2 ...
Hazardous Materials Class 4.3 : Dangerous when Wet 4.3 Dangerous when Wet : Solid substances that emit a flammable gas when wet or react violently with water ( sodium , calcium , potassium , calcium carbide ).
Either the test method specified in ASTM 4206 or the procedure in Appendix H of this part may be used to determine if a material sustains combustion when heated under test conditions and exposed to an external source of flame. Gasoline: This placard is an alternative placard, which may be used for gasoline in non-bulk quantities.
A United States placard showing the UN number 1814, indicating potassium hydroxide solution, on a railroad tank car.. A UN number (United Nations number) is a four-digit number that identifies hazardous materials, and articles (such as explosives, flammable liquids, oxidizers, toxic liquids, etc.) in the framework of international trade and transport.
Following the UN model, the DOT divides regulated hazardous materials into nine classes, some of which are further subdivided. Hazardous materials in transportation must be placarded and have specified packaging and labelling. Some materials must always be placarded, others may only require placarding in certain circumstances. [23]
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