Acetic Acid Glacial

Glacial Acetic Acid BP Grade Ph Eur -- C2H4O2 -- 60.1 -- 64-19-7 DEFINITION Content: 99.0 per cent m/m to 100.5 per cent m/m. CHARACTERS Appearance: Crystalline mass or clear, colourless, volatile liquid. Solubility: Miscible with water, with ethanol (96 per cent) and with methylene chloride. IDENTIFICATION A. A 100 g/L solution is strongly acid (2.2.4). B. To 0.03 mL add 3 mL of water R and neutralise with dilute sodium hydroxideA solution R. The solution gives reaction (b) of acetates (2.3.1). TESTS Solution S: Dilute 20 mL to 100 mL with distilled water. Appearance: The substance to be examined is clear and colourless. Freezing point: Minimum 14.8C. Reducing substances: To 5.0 mL add 10.0 mL of water and mix. To 5.0 mL of this solution add 6 mL of sulfuric acid, cool and add 2.0 mL of 0.0167 M potassium dichromate. Allow toA stand for 1 min and add 25 mL of water and 1 mL of a freshly prepared 100 g/LA solution of potassium iodide. Titrate with 0.1 M sodium thiosulfate, using 1.0 mL ofA starch solution as indicator. Not less than 1.0 mL of 0.1 M sodium thiosulfateA solution is required. Chlorides: Maximum 25 mg/L. Sulfates: Maximum 50 mg/L, determined on solution S. Iron: Maximum 5 ppm. Heavy metals: A Maximum 5 ppm. Residue on evaporation: Maximum 0.01 per cent. Evaporate 20 g to dryness on a water-bath and dry at 100-105 AC. The residueA weighs a maximum of 2.0 mg. ASSAY: Weigh accurately a conical flask with a ground-glass stopper containing 25 mL ofA water R. Add 1.0 mL of the substance to be examined and weigh again accurately.A Add 0.5 mL of phenolphthalein solution R and titrate with 1 M sodium hydroxide. 1 mL of 1 M sodium hydroxide is equivalent to 60.1 mg of C2H4O2. Glacial Acetic Acid USP Grade C2H4O2 60.05 Acetic acid -- 64-19-7. Glacial Acetic Acid contains not less than 99.5 percent and not more than 100.5 percent, by weight, of C2H4O2. Identification: A mixture of 1 volu...