Specification: Items Supergrade Some items are superior to the National Standard NN4CL(as dry basis), % 99.5min Moisture % 0.5max Residue in ignition % 0.4max Fe % 0.0007max Pb % 0.0005max SO4 % 0.02max PH value % 4.0-5.8 With anti-caking agent properties: White powdered crystals, specific gravity 1.532(17 °C)easily absords moisture, and forming a cake, soluble in water, and the solubility varies as the temperature increases, sublimes at 340 °C . It appears little corrosivity. Uses: Used in dry cell, dying, tanning, electrical plating. Also used as welding and hardener in molding of Precision castings. Package: In 25keg net in PP/PE bags. Cautions: Avoid Moisture and water, do not transport together with alkalis
uesd in Dry batteries,dying,tanning,electrical plating and so on.