Product name : Ferric Ammonium Citrate 28% Formula ; C6H8O7.Fe.NH3 CAS Nos. ; 1185-57-5 Molecular weight : 279.99 Appearance : Reddish Brown Crystalline Powder Assay (as Fe) ; 26.5% w/w to 29.5 % w/w Arsenic ; NMT 4 ppm Chloride ; NMT 0.25 % Sulphates ; NMT 0.30 % Heavy Metals (as Pb) ; NMT 30 ppm Zinc ; NMT 50 ppm