... Property: Colorless or white granular; easily becoming efflorescent in the dry air.1.Natural crystalline2.Mainly used for ... used as fertilizer for rubber, palm trees ;2. In industries: used in tanning, porcelain, pigment, match, fireproof materials, Mg ... dyeing, medicine and food additives;3. Extensively used in food, pharmaceutical and animal remedy industries. ITEMSSpecialty gradesFine gradeMgSo4 ...