Ignitable Liquid Classification System

Source: ATF National Laboratory

CLASS NUMBER (CLASS NAME)	"PEAK SPREAD" BASED N-ALKANE CARBON NOs (UNEVAPORATED LIQUID)	EXAMPLES
1 Light Petroleum Distillates (LPD)	C4-C11	Petroleum ethers. Pocket lighter fuels, some rubber cement solvents. VM & P Naphtha. Skelly solvents, some camping fuels.
2 Gasoline	C4-C12	All brands and grades of automotive gasoline, including gasohol.
3 Medium Petroleum Distillates (MPD)	C8-C12	Mineral spirits, some paint thinners, some charcoal starters, "Dry-cleaning" solvents, some torch fuels. Some solvents for insecticides, polishes, and some lamp oils.
4 Kerosine	C9-C16	Kerosine, No. 1 fuel oil, Jet-A (aviation) fuel, solvent for some insecticides and polishes, some paint thinners, some lamp oils.
5 Heavy Petroleum Distillates (HPD)	C10-C23	Diesel fuel. No. 2 fuel oil (home heating oil).
0 Miscellaneous	Variable	Single compounds, turpentine, specialty mixtures which cannot be further classified into one of the categories below.
0.1 Oxygenated Solvents	Variable	Alcohols, esters, ketones.
0.2 Isoparaffins	Variable	Isoparaffin products, some charcoal starters, some copier fluids, some aviation gasolines, some lamp oils, some solvents for insecticides and polishes, some camping fuels.
0.3 Normal alkanes	Variable	Specialty products formulated from normal alkanes. Some lamp oils, some solvents for insecticides and polishes.
0.4 Aromatic solvents	Variable	Light, medium, and heavy "aromatic naphtha" used as solvents for paints and plastics.
0.5 Naphthenic/paraffinic solvents	Variable	Specialty solvent/fuel produts made from Class 3 or Class 4 distillates treated to remove normal alkanes and aromatics.

Reprinted with permission.