AVA Chemicals [P] Ltd. Manufactures Chelated Feric Sodium Ethylene Diamine Tetra Acetic Acid. AVA Chemicals [P] Ltd. Is an ISO 9001:2000 certified company. The Chelated Feric Sodium Ethylene Diamine Tetra Acetic Acid has the CAS Number 15708-41-5. This chemical is a Light Yellow Tan Powder having a molecular weight of 421.1. Ph of a 1% Solution of Chelated Feric Sodium Ethylene Diamine Tetra Acetic Acid ranges 4 to 6. The chemical formula of the Chelated Feric Sodium Ethylene Diamine Tetra Acetic Acid is C10H12N2O8 FeNa.3H2O and the Copper Content is 13% [± 0.5].