We are offering di-ammonium hydrogen orthophosphate purified(anhydrous) (nh4)2hpo4 m.w. 132.06 assay(acidimetric) 97-102% ph(5% soln.) 7.9-8.2maximum limit of impurities :carbonate(as co2) passes testchloride(cl) 0.002%phosphite(pho3) passes testsulphate(so4) 0.02%heavy metals(as pb) 0.001%arsenic(as) 0.0002%iron(fe) 0.001%cas no : 7783-28-0 un no. Nr tariff : 3105 30 00r : 36 37 38 s : 26 - 36 f : 14