Magnesium Sulphate has markets in South America, Australia, Africa, Middle East, Thailand, Vietnam, Indonesia, factory supply ... 7H2OAppearance: white crystals ,bitter, soluble in water easily, lose one of molecular crystal water in dry air, relative density 1.68 ... (As) 0.0002%maxDry weightless48-52% Use: It is used in feed additive, aquiculture, fertilizer, currying, porcelain, printing, porcelain, ...