Neomycin Sulfate and Hydrocortisone Ointment
» Neomycin Sulfate and Hydrocortisone Ointment contains the equivalent of not less than 90.0 percent and not more than 135.0 percent of the labeled amount of neomycin, and not less than 90.0 percent and not more than 110.0 percent of the labeled amount of hydrocortisone (C21H30O5).
Packaging and storage— Preserve in collapsible tubes or in well-closed containers.
USP Reference standards 11
USP Hydrocortisone RS Click to View Structure
USP Neomycin Sulfate RS
Identification—
A: It meets the requirements for neomycin under Thin-Layer Chromatographic Identification Test 201BNP.
B: The retention time of the major peak for hydrocortisone in the chromatogram of the Assay preparation corresponds to that in the chromatogram of the Standard preparation, as obtained in the Assay for hydrocortisone.
Minimum fill 755: meets the requirements.
Water, Method I 921: not more than 1.0%, 20 mL of a mixture of toluene and methanol (7:3) being used in place of methanol in the titration vessel.
Assay for neomycin— Proceed with Ointment as directed in the Assay under Neomycin Sulfate Ointment.
Assay for hydrocortisone— Proceed with Ointment as directed in the Assay for hydrocortisone under Neomycin and Polymyxin B Sulfates, Bacitracin Zinc, and Hydrocortisone Ophthalmic Ointment.
Auxiliary Information— Please check for your question in the FAQs before contacting USP.
Topic/Question Contact Expert Committee
Monograph Ahalya Wise, M.S.
Senior Scientific Liaison
1-301-816-8161
(SM12010) Monographs - Small Molecules 1
Reference Standards RS Technical Services
1-301-816-8129
rstech@usp.org
USP35–NF30 Page 4015
Pharmacopeial Forum: Volume No. 28(4) Page 1157