We are offering ammonium ceric nitrate ar (as a standard in oxidimetry, catalyst for polymerization of olefins) (nh4)2ce(no3)6 m.w. 548.23 minimum assay after drying 99.0% max. Limits of impurities : substances insoluble in water 0.005% chloride(cl) 0.001% phosphate(po4) 0.002% heavy metals(pb) 0.002% iron(fe) 0.003% sodium(na) 0.005% cas no : 16774-21-3 un no. 5.11477 tariff : 2846 10 90 r : 8-3638 s : 17-26-36 f :