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%