essential crop nutrients white powder and granular Colorless crystals,density 2.662g/cm3,melting point 1069°C ,soluble in water. Moisture absorption is small, uneasy caking,good physical properties, easy application, is a good water-soluble potash.Appearance1) Industrial Grade Potassium Sulphate: colorless or white hexagonal or orthorhombic crystalline or granular powder. Transformation of the ...