We do supply products of high quality, meeting customers expectations and also as per clients requirements. Physical appearance: Granular deep, Yellow crystal or Pellets Assay: Double refined, 99.0% Ash/Residue on Ignition: 0.05% Iron mg/kg: 0.02% Heavy metals as Pb, As, Se, Te, etc.,: Nil Melting Point: 118 120 Deg