Class 4

Class 4.1 includes flammable substances and objects, explosive substances in a non-explosive state and spontaneously combustible solids and liquids. Class 4.2 includes pyrophorus substances (substances that ignite spontaneously within 5 minutes when in contact with air) and substances susceptible to self-heating (substances that heat themselves up when in contact with air). Class 4.3 includes substances that react to water in a dangerous way.


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