Self-heating material.

Self-heating material. A self-heating material is a material that through a process where the gradual reaction of that substance with oxygen (in air) generates heat. If the rate of heat production exceeds the rate of heat loss, then the temperature of the substance will rise which, after an induction time, may lead to self-ignition and combustion. A material of this type which exhibits spontaneous ignition or if the temperature of the sample exceeds 200 C (392 F) during the 24-hour test period when tested in accordance with UN Manual of Tests and Criteria (IBR; see 171.7 of this subchapter), is classed as a Division 4.2 material.
A self-heating material is a material that through a process where the gradual reaction of that substance with oxygen (in air) generates heat. If the rate of heat production exceeds the rate of heat loss, then the temperature of the substance will rise which, after an induction time, may lead to self-ignition and combustion. A material of this type which exhibits spontaneous ignition or if the temperature of the sample exceeds 200 C (392 F) during the 24-hour test period when tested in accordance with UN Manual of Tests and Criteria (IBR;see 171.7 of this subchapter), is classed as a Division 4.2 material.

Source

49 CFR § 173.124


Scoping language

Desensitized explosives that -
(i) When dry are Explosives of Class 1 other than those of compatibility group A, which are wetted with sufficient water, alcohol, or plasticizer to suppress explosive properties; and
(ii) Are specifically authorized by name either in the Hazardous Materials Table in § 172.101 of this subchapter or have been assigned a shipping name and hazard class by the Associate Administrator under the provisions of -
(A) A special permit issued under subchapter A of this chapter; or
(B) An approval issued under § 173.56(i).
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