Packaging and storage
Preserve in single-dose, light-resistant containers, preferably of Type I glass.
Identification
A:
Evaporate 1 mL of Injection on a steam bath to dryness: the residue responds to
Identification test
A under
Emetine Hydrochloride.
Limit of cephaeline
[noteConduct this test in subdued light until after the chromatogram has been completely developed.
]
Standard preparation
and
Spray reagentPrepare as directed in the test for
Limit of cephaeline under
Emetine Hydrochloride.
Test preparation
Evaporate 1.0 mL of Injection on a steam bath with the aid of a stream of nitrogen just to dryness. Dissolve the residue in a sufficient volume of methanol to obtain a Test preparation having a concentration of 10 mg of emetine hydrochloride per mL.
Procedure
Proceed as directed for
Procedure in the test for
Limit of cephaeline under
Emetine Hydrochloride.
Other requirements
It meets the requirements under
Injections 1.
Assay
Transfer an accurately measured volume of Injection, equivalent to about 120 mg of emetine hydrochloride, to a suitable extraction apparatus containing about 20 mL of water. Add 6 N ammonium hydroxide until the solution is strongly alkaline, and extract with ether until 0.5 mL of the water layer, slightly acidified with hydrochloric acid, remains unaffected by the addition of a few drops of mercuric-potassium iodide TS. Evaporate the combined ether extracts on a steam bath, allowing the last few mL of the ether to evaporate spontaneously. Add to the residue 2 mL of neutralized alcohol and 30.0 mL of 0.02 N sulfuric acid VS, and warm gently until the alkaloid is dissolved. Cool, add
methyl red TS, and titrate the excess acid with 0.02 N sodium hydroxide VS. Each mL of 0.02 N sulfuric acid is equivalent to 5.536 mg of C
29H
40N
2O
4·2HCl.