CAS No.: 10034-99-8 Molecular Formula:MgSO4.7H2O Specification : DRYING Content as MgSO4.7H2O 99.8 Min Fe 0.0015% Max Pb 0.001% max Mn 0.0025% max As 0.0002% Max PH 7 NON-DRYING Content as MgSO4.7H2O 99.58 Min Fe 0.0015% Max Pb 0.001% max Mn 0.0025% max As 0.0002% Max PH 7 Properties: WHITE LITTLE CRYSTAL. Application: As a main materials in fertilizer.also can be used in stockfeed additive leather, dyeing, pigment, refractoriness,ceramic,marchdynamite andmg salt industry.