<unk><unk>  are any materials in the<unk> phase of matter that can readily undergo combustion in the presence of a source of ignition under standard circumstances, i.e. without:
Artificially changing variables such as pressure or density; or
Adding accelerants.
HAZMAT Class 4 Flammable Solids
HAZMAT Class 3 Flammable Liquids
HAZMAT Class 1 Explosives
HAZMAT Class 8 Corrosive Substances
Toxic Adenoma classification
Farmer's lung epidemiology and demographics
ICD-9-CM Volume 3
Toxic Adenoma other imaging findings