The<unk>  hazardous materials category encompasses all hazardous materials that do not fit one of the definitions listed in Class 1 through Class 8.
HAZMAT Class 9 Miscellaneous
HAZMAT Class 2 Gases
HAZMAT Class 1 Explosives
ICD-9-CM Volume 3
HAZMAT Class 5 Oxidizing Agents and Organic Peroxides
HAZMAT Class 3 Flammable Liquids
HAZMAT Class 6 Toxic and Infectious Substances
Wild-type 