... and in the tannery. Also to be used feedstuff CompositionSpecification(Tech grade)(Purity),wt. % ,min98(Ca content),wt. % ,min30.1(Heavy metals ... of 10% water solution)6.5-7.5 CompositionSpecification(Feed grade)(Purity),wt. % ,min98(Ca content),wt. % ,min30.1(Heavy metals ...