Packaging and storage—
Preserve in well-closed containers.
Identification—
A:
Dissolve about 1.5 g in 10 mL of water, add 5 mL of 3 N hydrochloric acid, collect the crystals by filtration with suction, wash with 10 mL of water, and dry at 80
for 4 hours: the crystals so obtained melt between 109
and 111
(see
Melting Range or Temperature 
741
).
B:
A solution (1 in 20) responds to the tests for
Sodium 191.
Assay—
Transfer to a 125-mL conical flask about 500 mg of Sodium Dehydroacetate, accurately weighed, dissolve it in 25 mL of glacial acetic acid containing p-naphtholbenzein TS which has been previously neutralized to a blue color, and titrate with 0.1 N perchloric acid VS to the original blue color. Each mL of 0.1 N perchloric acid is equivalent to 19.01 mg of C8H7NaO4.
