Packaging and storage—
Preserve in tight containers.
Identification—
It responds to the tests for
Acetate 
191
.
Nonvolatile residue—
Evaporate 20 mL in a tared porcelain dish on a steam bath, and dry at 105
for 1 hour: the weight of the residue does not exceed 1.0 mg (0.005%).
Chloride—
Add 5 drops of
silver nitrate TS to 10 mL of a solution (1 in 10): no opalescence is produced.
Sulfate—
Add 5 drops of
barium chloride TS to 10 mL of a solution (1 in 10): no turbidity is produced.
Heavy metals 231—
To the residue obtained in the test for
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 10 mL of the solution: the limit is 0.001%.
Readily oxidizable substances—
Dilute 4.0 mL in a glass-stoppered vessel with 20 mL of water, and add 0.30 mL of 0.10 N potassium permanganate: the pink color is not changed to brown at once, and the liquid does not become entirely brown or free from a pink tint in less than 30 seconds.
Assay—
Place about 6 mL of Acetic Acid in a tared, glass-stoppered flask, and weigh accurately. Add 40 mL of water, then add phenolphthalein TS, and titrate with 1 N sodium hydroxide VS. Each mL of 1 N sodium hydroxide is equivalent to 60.05 mg of C2H4O2.
