Packaging and storage
Preserve in tight, light-resistant containers.
USP Reference standards 11
USP Prochlorperazine Maleate RS.
NOTEThroughout the following procedures, protect test or assay specimens, the Reference Standard, and solutions containing them, by conducting the procedures without delay, under subdued light, or using low-actinic glassware.
Ordinary impurities 466
Test solution:
methanol.
Standard solution:
methanol.
Eluant:
a mixture of methanol and ammonium hydroxide (100:1).
Visualization:
1.
Assay
Transfer about 400 mg of Prochlorperazine, accurately weighed, to a 125-mL conical flask, add 30 mL of glacial acetic acid, and warm on a steam bath to dissolve. Add 2 drops of
crystal violet TS, and titrate with 0.1 N perchloric acid VS to a blue endpoint. Perform a blank determination, and make any necessary correction. Each mL of 0.1 N perchloric acid is equivalent to 18.70 mg of C
20H
24ClN
3S.