Molecular Formula : C4H5O6KNa.4H2O
Molecular Weight : 282.23
Properties : Colorless and transparent or white crystals, specific gravity:1.77, Melting point : 70-80. Slight efflorescence in the air. Begin to lost partial water of crystallization above 60. entirely lost all water of crystallization above 215, easily soluble in water solution to appear alkaloscence.
Chlorine radical : 0.005% max
PH : 6.8 to 8
Heavy metal(Pb) : 0.001% max
Iron : 0.002%max
Sulfate : 0.02%max
water insoluble matter : 0.005%max