We are offering ammonium ferric sulphate extra pure ammonium iron (iii) sulphate nh4fe(so4)2.12h2o m.w. 482.19 min. Assay(by iodometry) 98-101% max. Limits of impurities : chloride(cl) 0.002% lead(pb) 0.002% iron(ii)fe(ii) 0.002% copper(cu) 0.002% zinc(zn) 0.005% substances not precipitable by nh3(as sulphate) 0.1% cas no : 7783-83-7 un no. Nr tariff : 2833 29 90 r : 36 37 38 s : 26 - 36 f :
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Andheri West, Mumbai, Maharashtra