Commodity name：Potassium sodium tartrate
Synonym：Rochelle Salt
CAS Number：6381-59-5
Molecular Formula：KNaC4H4O6·4H2O
Molecular Weight：282.23
Properties：Colorless crystals or white crystal,specific gravity is 1.79,PH value is 6.8~8,the melting point is 70~80°C.Have minute efflorescence in the heat air,lose some water when heated to 60°C,and lose 3 water molecules at 100°C,become salt without water at 215°C. Freely insoluble in water, the solution assumes minute alkalescence.
Specification US FCC(IV)（Food grade）
Content：99.0-102.0%
Alkalinity：passed
Arsenic ( As )：0.0003%maxMolecular Formula：KNaC4H4O6·4H2O
Molecular Weight：282.23
Properties：Colorless crystals or white crystal,specific gravity is 1.79,PH value is 6.8~8,the melting point is 70~80°C.Have minute efflorescence in the heat air,lose some water when heated to 60°C,and lose 3 water molecules at 100°C,become salt without water at 215°C. Freely insoluble in water, the solution assumes minute alkalescence.
Specification US FCC(IV)（Food grade）
Content：99.0-102.0%
Alkalinity：passed
Clarity：passed
Loss on drying：0.20% max
Heavy metal(As Pb)：0.001% max
Water：21-26%
Uses
This product is used as reducer in plating of printing, mirror, and thermos industries; as complexing agent in electroplating industry;as laxative agent in pharmacy in the making of crystal speakers and microphones in telecom industry; as desalting agent in chemical fertilizer industry; and also used in glass industry and other industries.