1, ISO9001:2000 certificate 2, SGS Certificate 3, Reach Certificate 4, We manufacture this product for over 10 years •Product ... (PH of 10% water solution)6.5-7.5 CompositionSpecification(Feed grade)(Purity),wt. % ,min98(Ca content),wt. % ,min30.1(Heavy ... metals),(Pb)0.001(Water insoluble),.0.3(Dry weight loss),wt. % ,max0.5(PH of 10% water ...