Sodium stannate trihydrate Molecular Formula : Na2SnO3·3H2O CAS Number : 12209-98-2 Despcription: Solubility in water : soluble Specification Sn : 42.0% min, Pb : 0.002% max Sb : 0.005% max As : 0.01% max Fe : 0.02% max NO3 : 0.1% max Free Alkali(NaOH) : 3.5% max, Insoluble matter in Alkali : 0.1% max Packing: 25kgs net iron drum inner with plastic bag