Simi Chemicals offers Magnesium Sulphate. Simi Chemicals also manufactures Sodium Thiosulphate, Anhydrous Sodium Thiosulphate, Magnesium Sulphate, Anhydrous Magnesium Sulphate, industrial chemicals and water treatment chemicals. Magnesium Sulphate is formulated with high grade raw material and is widely used in agriculture and gardening industry to correct magnesium deficiency in the soil. This is non-toxic and also known as Epsom salt.