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