NFPA Flammable & Combustible Class Types

Flammables
Class IA - Flash Point: <73 degrees Fahrenheit, Boiling Point <100 degrees Fahrenheit

Class 1B - Flash Point: <73 degrees Fahrenheit, Boiling Point >=100 degrees Fahrenheit

Class 1C - Flash Point: <73 degrees Fahrenheit and <100 degrees Fahrenheit, Boiling Point >100 degrees Fahrenheit

Combustables
Class II - Flash Point 100 degrees Fahrenheit <= FP < 140 degrees Fahrenheit

Class IIIA - Flash Point 140 degrees Fahrenheit <= FP < 200 degrees Fahrenheit

Class IIIB - Flash Point 200 degrees Fahrenheit <= FP