Used in manufacture of dry battery, storage battery, ammonia compounds and analytical reagents; Elec-trobath additives. It is also used in refining rarechemical elements Specification: content >=99.3% water <=0.7% Fe <=0.001% Pb <=0.0005% If you are interested in it or if you have any other problem ,pls feel free to contact me at any time. BRS residue on ignition <=0.4% suphate <=0.02% PH 200g/l 25.C 4.0--5.8 Packing:25kgs/bag Payment terms :T/T in advance Delivery time: In 15 days after receiving your payment