... been approved by ISO9001:2000, GB/T19001-2000 Quality management system certificate. Our products are mainly export to Singapore, ... the temperature increases, sublimes at 340 . It appears strong corrosivity. Uses: It is a kind of fine nitrogenous fertilizer, ... category ,dyeing aid, electroplating bath additive and analytical reagent. It aso used in tanning, pharmacy, precision casting and photography. ...