... in the tannery. Also to be used feedstuff CompositionSpecification(Tech grade)(Purity),wt. % ,min98(Ca content),wt. % ,min30.1(Heavy ... insoluble),.---(Dry weight loss),wt. % ,max0.5(PH of 10% water solution)6.5-7.5 CompositionSpecification(Feed grade)(Purity),wt. % ,min98(Ca content), ... 3(Dry weight loss),wt. % ,max0.5(PH of 10% water solution)6.5-7.5As(%) ≤0.0005Pb(%)≤0.0002AppearanceWhite crystalline ...