Acetic Acid Glacial
Content: 99.0 per cent m/m to 100.5 per cent m/m.
Appearance: Crystalline mass or clear, colourless, volatile liquid.
Solubility: Miscible with water, with ethanol (96 per cent) and with methylene chloride.
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 hydroxideÂ solution R. The solution gives reaction (b) of acetates (2.3.1).
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 toÂ stand for 1 min and add 25 mL of water and 1 mL of a freshly prepared 100 g/LÂ solution of potassium iodide. Titrate with 0.1 M sodium thiosulfate, using 1.0 mL ofÂ starch solution as indicator. Not less than 1.0 mL of 0.1 M sodium thiosulfateÂ solution is required.
Chlorides: Maximum 25 mg/L.
Sulfates: Maximum 50 mg/L, determined on solution S.
Iron: Maximum 5 ppm.
Heavy metals: Â 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 Â°C. The residueÂ weighs a maximum of 2.0 mg.
ASSAY: Weigh accurately a conical flask with a ground-glass stopper containing 25 mL ofÂ water R. Add 1.0 mL of the substance to be examined and weigh again accurately.Â 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
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 volume of it with 2 volumes of water responds to the tests for Acetate.
Congealing temperature: not lower than 15.6 .
Limit of nonvolatile residue: Evaporate 20 mL in a tared dish, and dry at 105 for 1 hour: the weight of the residue does not exceed 1.0 mg.
Chloride: Dilute 1.0 mL with 20 mL of water, and add 5 drops of silver nitrate. No opalescence is produced.
Sulfate: Dilute 1.0 mL with 10 mL of water, and add 1 mL of barium chloride. No turbidity is produced.
Heavy metals: To the residue obtained in the test for Limit of nonvolatile residue add 8 mL of 0.1 N hydrochloric acid, warm gently until solution is complete, dilute with water to 100 mL, and use 20 mL of the solution: the limit is 5 ppm.
Readily oxidizable substances: Dilute 2.0 mL in a glass-stoppered vessel with 10 mL of water, and add 0.10 mL of 0.10 N potassium permanganate: the pink color is not changed to brown within 2 hours.
|CAS Registry Number||64-19-7|
|Categories||APIs (Active Pharmaceutical Ingredients); Custom Manufacturing|
|Sales markets||Middle East Region (e.g. UAE); Oceania; North America (USA, Canada); Africa; Central America (e.g. Mexico); East Asia (e.g. China, Japan, Korea); Europe - EU countries; Europe - non EU (e.g. UK, Russia, ex-CIS countries); South America (e.g. Brazil, Colombia); South Asia (e.g. India, Pakistan, Sri Lanka); South East Asia (e.g. Thailand, Philippines, Singapore)|
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