AVA Chemicals [P] Ltd. Manufactures EDTA Pure Acid. AVA Chemicals [P] Ltd. Is an ISO 9001:2000 certified company. EDTA Pure Acid is a White Powder like chemical with a molecular weight of 292.2. The CAS Numbers are 60-00-04. EDTA Pure Acid contains a minimum of 99 % of active Content. Ph of a saturated Solution of EDTA Pure Acid is 2.0 to 3.0 and it has chelation value is 330 mg CaCo3 / g.