Packaging and storage—
Preserve in tight containers.
Identification—
It responds to the tests for
Sodium 
191
and for
Acetate 191.
pH 791:
between 7.5 and 9.2, when diluted with carbon dioxide-free water to contain 5% of solids.
Insoluble matter—
Dilute a quantity of Solution, equivalent to 20 g of anhydrous sodium acetate, with water to 150 mL, heat to boiling, and digest in a covered beaker on a steam bath for 1 hour. Filter through a tared filtering crucible, wash thoroughly, and dry at 105
: the weight of the residue does not exceed 1 mg (0.005%).
Chloride 221—
A quantity of Solution, equivalent to 1.0 g of anhydrous sodium acetate, shows no more chloride than corresponds to 0.50 mL of 0.020 N hydrochloric acid (0.035%).
Sulfate 221—
A quantity of Solution, equivalent to 10 g of anhydrous sodium acetate, shows no more sulfate than corresponds to 0.50 mL of 0.020 N sulfuric acid (0.005%).
Calcium and magnesium—
Dilute a quantity of Solution, equivalent to 1.0 g of anhydrous sodium acetate, to 100 mL with water. To 20 mL of this solution add 2 mL each of 6 N ammonium hydroxide, ammonium oxalate TS, and sodium phosphate TS: no turbidity is produced within 5 minutes.
Potassium—
To a quantity of Solution, equivalent to 3.0 g of anhydrous sodium acetate, add 0.2 mL of
sodium bitartrate TS: no turbidity is produced within 5 minutes.
Heavy metals, Method I 231—
Dilute a quantity of Solution, equivalent to 2.0 g of anhydrous sodium acetate, with water to 25 mL, and use glacial acetic acid instead of 1 N acetic acid for adjustment of the pH: the limit is 0.001%.
Assay—
Weigh accurately about 1 g of Solution into a 250-mL conical flask, cautiously add (in a fume hood) 2.6 mL of acetic anhydride, mix, and allow to stand for 5 minutes. Add 25 mL of glacial acetic acid and 2 drops of p-naphtholbenzein TS, and titrate with 0.1 N perchloric acid VS. Perform a blank determination, using 0.5 mL of water, and make any necessary correction. Each mL of 0.1 N perchloric acid is equivalent to 8.203 mg of C2H3NaO2.
