1.Mn>31.5%,Pb<20ppm,As<10ppm,Cd<10ppm 2.Annual output:20000MT 3.A major manufacturer of manganese sulphate 1.Mn>31.5%,Pb<20ppm,As<10ppm,Cd<10ppm2.Annual output:20000MT3.A major manufacturer of manganese sulphate We produce and sell large quantity manganese sulphate evry year.Our business scope inculde zinc sulphate monohydrate powder and granular,zinc sulphate heptahydrate powder and grannular, ...