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Purity: 99.8PCT min.(by sublimation), 99.82 Moisture: 0.10PCT max.,0.07 Ash: 0.03PCT max. 0.02 Ph value: 7.5 -- 9.5, 8.1 Colour(APHA): 20 max., 15 Haze(bolus alba) degree: 20 max, 20 Aspect: White crystalline powder White crystalline powder.