Description Tin Metal, Mossy, ACS, 99.95% (Metals Basis), Certified, 500g For Research & Development Not for drug, human, animal, or food use Certificate of Analysis: Purity by metals basis 99.95% Irregular silvery pieces conforms Identification passes test Arsenic (As) <0.001% Copper (Cu) <0.002% Iron (Fe) <0.005% Lead (Pb) <0.005% Total foreign metals (as oxides) <0.002% Zinc (Zn) 0.0003% CAS: 7440-31-5 FORMULA: Sn