AVA Chemicals [P] Ltd. Manufactures Powdered Trisodium Salt of Ethylene Diamine Tetra Acetic Acid. AVA Chemicals [P] Ltd. Is an ISO 9001:2000 certified company. Molecular weight of Powdered Trisodium Salt of Ethylene Diamine Tetra Acetic Acid is 412.3. It has a White Powder like appearance while its Active Content is minimum 99 %. Ph of a 1% Solution of Powdered Trisodium Salt of Ethylene Diamine Tetra Acetic Acid varies 6.5 to 7.5 and its chelation value is 245 to 255 mg CaCo3 / g.