... , printing and dyeing, leather, paints SpecificationsMagnesium sulfate: 1. main content: 99.5%. 2.Appearance:white crystal. 3.used in fertilizer,agriculture,industryMagnesium ... .47 main content 99.5%. Mg 9.81% white crystal. Magnesium sulfate is used infertilizer,feed additive,and industry and agriculture application ...