Potassium sorbate complies with FCCIV standard, The specification if following: IDENTIFICATION:CONFORM TO STANDARD APPEARANCE: WHITE GRANULAR LOSS OF DRYING:1%MAX ALKALINITY(as K2CO3): 1%MAX ACIDITY(As sorbic acid):About 1% HEAVY METAL(Pb):10PPM MAX ARSENIC(As ):3PPM MAX ASSAY :99.0-101.0%