1)zinc sulphate monohydrate 35% 2)Zn :34.5%,35% Min 3)ZnSO4:94.7%,96%Min ... crystal powder,granule SGS CCIC Supply zinc sulphate monohydrate 35% Testing ItemsPercentageHG2934-2000 National StandardInternal StandardAppearance White powderWhite ... Sulphate content%≥ 94.7≥ 96.09Zn%≥ 34.5≥ 35.0 Pb%≤ 0.002≤ 0.001As%≤ 0.0005≤ 0.0005Cd%≤ ... only National standard product supply zinc sulphate monohydrate 35%