... the building industry, for silage and in the tannery. 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 ... -7.5As(%) ≤0.0005Pb(%)≤0.0002AppearanceWhite crystalline powder 98% Feed Grade and Tech Grade Calcium formate