... , glass, paper making, tanning, metal smelting, surface treatment and filler industries. Grade: Class I first quality Packing: 50kg/piece ... : white monoclinic crystal or powder. Storage: Stored in a cool, ventilated warehouse. Away from fire and heat. Acids, etc. should be ... agent or flocculating agent in medicine, and can be used in paper, glass, printing and dyeing, synthetic fiber, leather industry ...