99% Magnesium Sulphate Heptahydrate Fertilizer transparent crystal very dry, free flowing ... heptahydrate, epsom salts; bitter salts, when it is used in industry, it is MgSO4·7H2O.It can be used in medicine ... textile, papermaking, metallurgy, electronics, or used as fertilizer, feedstuff additives.99% Magnesium sulfate heptahydrate fertilizer quality index: AppearanceWhite small granularMain content99 ...