Potassium Sodium Tartrate FCC Grade is commonly called Rochelle salt, its used in a variety of applications, such as in organic synthesis, in the food industry, and as a medicine in the pharmaceutical industry. Itâ??s used as sequestrant, stabilizer and general-purpose food additive for the food industry and pharmaceutical industry; used as a laboratory reagent, Used in mirror production, in electroplating, its used in the production of wall plaster, and cigarette paper, its used in Fehlingâ??s solution, crystal-controlled oscillators, and as saline cathartic. The FCC grade meets the requirements of the Food Chemical Codex indicates and is suitable for all food, beverage and nutritional supplement applications. Sales Specification Quality Standard: FCC III Assay: 99.0%-102.0% Alkalinity: Conforming to the standard Chloride: 0.035% Max Moisture: 21-26 PH Value: 8-8.50 Heavy Metals as Pb: 0.001% Max As: 0.0003% Max Catalyst Tungsten Acid: 1.2% Max Packing 55.12 lb bag, 40 bags per pallet