Neomycin Sulfate and Hydrocortisone Acetate Ointment
»Neomycin Sulfate and Hydrocortisone Acetate Ointment contains the equivalent of not less than 90.0percent and not more than 135.0percent of the labeled amount of neomycin,and not less than 90.0percent and not more than 110.0percent of the labeled amount of hydrocortisone acetate (C23H32O6).
Packaging and storage— Preserve in collapsible tubes or in well-closed containers.
Identification—
A: It meets the requirements for neomycin underThin-Layer Chromatographic Identification Test á201BNPñ.
B: The retention time of the major peak for hydrocortisone acetate in the chromatogram of theAssay preparationcorresponds to that in the chromatogram of theStandard preparation,as obtained in theAssay for hydrocortisone acetate.
Minimum fill á755ñ: meets the requirements.
Water,Method Iá921ñ: not more than 1.0%,20mLof a mixture of toluene and methanol (7:3)being used in place of methanol in the titration vessel.
Assay for neomycin— Proceed with the Ointment as directed in theAssay underNeomycin Sulfate Ointment.
Assay for hydrocortisone acetate— Proceed with the Ointment as directed in theAssay underHydrocortisone Acetate Lotion.
Auxiliary Information— Staff Liaison:William W.Wright,Ph.D.,Scientific Fellow
Expert Committee:(PA7)Pharmaceutical Analysis 7
USP28–NF23Page 1349
Pharmacopeial Forum:Volume No.30(2)Page 518
Phone Number:1-301-816-8335
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