We are offering di-ammonium hydrogen orthophosphate purified(anhydrous) (nh4)2hpo4 m.w. 132.06 assay(acidimetric) 97-102% ph(5% soln.) 7.9-8.2 maximum limit of impurities : carbonate(as co2) passes test chloride(cl) 0.002% phosphite(pho3) passes test sulphate(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 00 r : 36 37 38 s : 26 - 36 f :