99% agri Grade Magnesium Sulfate Heptahydrate main content 99% white crystal very dry, free flowing used in fertilizer Magnesium sulphate,also named magnesium sulfate heptahydrate, epsom ... medicine, textile, papermaking, metallurgy, electronics, or used as fertilizer, feedstuff additives.99% agri grade Magnesium sulfate heptahydrate quality index: AppearanceWhite small granularMain content99 ...