Class 4 Spontaneously Combustible

Additional Details

Spontaneously Combustible Division 4.2

1. A pyrophoric material. A pyrophoric material is a liquid or solid that, even in small quantities and without an external ignition source, can ignite within five 5 minutes after coming in contact with air when tested according to the UN Manual of Tests and Criteria.
2. A self-heating material. A self-heating material is a material that, when in contact with air and without an energy supply, is liable to self-heat. A material of this type which exhibits spontaneous ignition or if the temperature of the sample exceeds 392°F during the 24-hour test period when tested in accordance with paragraph 3.b.1 of appendix E to this part, is classed as a Division 4.2 material.