Glacial Acetic Acid

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Specifications of Glacial Acetic Acid USP Grade
C2H4O2 -- 60.05
CAS 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.

Specifications of Glacial Acetic Acid BP Grade
Ph Eur -- C2H4O2 -- 60.1 --CAS 64-19-7

CHARACTERS
Appearance: Crystalline mass or clear, colourless, volatile liquid.
Solubility: Miscible with water, with ethanol (96 per cent) and with methylene chloride.

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 to stand for 1 min and add 25 mL of water and 1 mL of a freshly prepared 100 g/L solution of potassium iodide. Titrate with 0.1 M sodium thiosulfate, using 1.0 mL of starch solution as indicator. Not less than 1.0 mL of 0.1 M sodium thiosulfate solution is required.
Chlorides: Maximum 25 mg/L.
Sulfates: Maximum 50 mg/L, determined on solution S.
Iron: Maximum 5 ppm.
Heavy metals: Maximum 5 ppm.
Residue on evaporation: Maximum 0.01 per cent.
Evaporate 20 g to dryness on a water-bath and dry at 100-105C. The residue weighs a maximum of 2.0 mg.

Specifications of Acetic Acid, Glacial FCC Food Grade
C2H4O2 Formula wt 60.05
INS: 260 CAS: 64-19-7
FEMA: 2006

DESCRIPTION
Acetic Acid, Glacial, occurs as a clear, colorless liquid. It boils at about 118C. When well diluted with water (e.g., 1:100), it has a vinegar odor and taste. It is miscible with water, with alcohol, and with glycerin.
Function:Acidifier; flavoring agent.

Specifications of Glacial Acetic Acid IP Grade Specifications:

Glacial Acetic Acid contains not less than 99% and not more than 100.5% of C2H4O w/w.
Category: Acififying agent, buffering agent, Pharmaceutical aid.

Freezing point: Not less than 14.8C.
Residue on evaporation: Not more than 0.01% determined on 20 g evaporationg on water bath and drying at 105C.
Reducing substances: To pass the test.
Heavy metals, Iron, Chlorides, Sulphates: To pass the test.

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