Potassium Sorbate FCCIV/USP27/BP2007Potassium Sorbate Detailed Specification: Appearance: White Spherical Granular Assay: 99%-101% Free Acid: About 1% Free Alkali: About 1% Heavy metal(Pb): 10ppm max Arsenic: 3ppm max Loss on Drying: 1.0%max Lead: 5ppm max Melting Range: 270ºC Mesh: 10-20mesh