Scopolamine Hydrobromide Ophthalmic Ointment
» Scopolamine Hydrobromide Ophthalmic Ointment is Scopolamine Hydrobromide in a suitable ophthalmic ointment base. It contains not less than 90.0 percent and not more than 110.0 percent of the labeled amount of (C17H21NO4)·HBr·3H2O. It is sterile.
Packaging and storage—
Preserve in collapsible ophthalmic ointment tubes.
USP Reference standards 
11
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11—
USP Scopolamine Hydrobromide RS 
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Identification—
A:
Transfer a portion of Ophthalmic Ointment, equivalent to about 50 mg of scopolamine hydrobromide, to a suitable separator, and dissolve in 25 mL of ether. Add 25 mL of 0.01 N hydrochloric acid, shake vigorously, allow the layers to separate, and discard the organic phase. Proceed as directed under Identification—Organic Nitrogenous Bases 181, beginning with “In a second separator dissolve 50 mg.”
181, beginning with “In a second separator dissolve 50 mg.”
B:
Transfer about 5 g of Ophthalmic Ointment to a separator, dissolve in 50 mL of ether, and extract with 20 mL of water: the extracted solution so obtained responds to the tests for Bromide 191.
191.
Sterility 71:
meets the requirements.
71:
meets the requirements.
Metal particles—
It meets the requirements of the test for Metal Particles in Ophthalmic Ointments 751.
751.
Assay—
Proceed with Ophthalmic Ointment as directed in the Assay under Scopolamine Hydrobromide Injection, but to prepare the Assay solution, weigh accurately a portion of Ophthalmic Ointment equivalent to about 10 mg of scopolamine hydrobromide into a separator containing 50 mL of ether, shake to dissolve, extract with three 25-mL portions of 0.2 N sulfuric acid, collect the acid extracts in a 100-mL volumetric flask, dilute with 0.2 N sulfuric acid to volume, and mix. Calculate the quantity, in mg, of C17H21NO4·HBr·3H2O in the portion of Ophthalmic Ointment taken by the formula given therein.
Auxiliary Information—
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| Topic/Question | Contact | Expert Committee |
|---|---|---|
| Monograph | Feiwen Mao, M.S.
Senior Scientific Liaison 1-301-816-8320 |
(SM32010) Monographs - Small Molecules 3 |
| Reference Standards | RS Technical Services 1-301-816-8129 rstech@usp.org |
|
| 71 |
Radhakrishna S Tirumalai, Ph.D.
Principal Scientific Liaison 1-301-816-8339 |
(GCM2010) General Chapters - Microbiology |
USP35–NF30 Page 4616