... )---(Water insoluble),.---(Dry weight loss),wt. % ,max0.5(PH of 10% water solution)6.5-7.5 CompositionSpecification(Feed grade)(Purity),wt. % ,min98 ... ),.0.3(Dry weight loss),wt. % ,max0.5(PH of 10% water solution)6.5-7.5As(%) ≤0.0005Pb(%)≤0.0002AppearanceWhite crystalline ...