AVA Chemicals [P] Ltd. Manufactures Trisodium Nitrilotri Acetic Acid. AVA Chemicals [P] Ltd. Is an ISO 9001:2000 certified company. Trisodium Nitrilotri Acetic Acid is a yellowish white powder with 99% [±1] active content. The CAS numbers of the chemical is 5064-31-3. Ph of a 1% Solution of Trisodium Nitrilotri Acetic Acid ranges 10.5 to 11.5. Its chelation value is 380 mg CaCo3 / g.