... , HS Code:29212190 3, CAS-No: 15708-41-5 4, Formula: EDTA-FeNa. 3H2O (C10H12FeN2NaO8) 5, Molecular weight: 421.1 6, Characteristics & Application ... %max. 4, PH value (1% of the solution) 4-6.5 5, Heavy metals(as per Pb): 4.0ppm max. 6, Appearance ...