Properties of biodiesel—defined as a fatty acid alkyl (methyl or ethyl) ester for use as blending component in diesel—are specified in the Indian Standard 15607:2005. The standard is based mainly on the European specification EN 14214, with some specifications taken from the ASTM D 6751 standard.
There are also certain differences between the Indian standard and the EN/ASTM specifications, in part reflecting the focus on different feedstocks (such as jatropha and pongamia):
- A number of specifications are not included: mono-, di- and tri-glycerides; poly unsaturated methyl ester; linolenic acid methyl ester; and low temperature properties (CP, CFPP, PP).
- Some parameters are only to be reported: Na, K, Ca, Mg and iodine value.
- The specification includes limits on both methanol and ethanol.