AVA Chemicals [P] Ltd. Offers IP Passing Extra Pure Grade Sodium Citrate. AVA Chemicals [P] Ltd. Is an ISO 9001:2000 certified company. IP Passing Extra Pure Grade Sodium Citrate complies with the standard parameters. It is a white Crystalline Powder which is freely soluble in water. On anhydrous basis, its assay is 99.44 % w/w. IP Passing Extra Pure Grade Sodium Citrate contains impurities like: Arsenic: less than 2 ppm, Heavy Metals: less than 10 ppm, Chloride: less than 100 ppm, Oxalate: less than 300 ppm, Sulphate: less than 150 ppm and Water: 12.10% w/w. The standard specifications of IP Passing Extra Pure Grade Sodium Citrate are: