1)Zinc Sulfate Heptahydrate Tech Grade 2)Zn :22.28%,22.51% Min 3)ZnSO4:98%,99%Min 4)Form:White crystal powder,granule Zinc Sulfate Heptahydrate 98% Tech GradeWe are Tianjin Xinxin Chemical Factory, the largest manufacturer of zinc sulfate heptahydrate in China,and our product export to many countries and enjoy a high reputation for it's quality in the market.Further informations you want ,please ...
