Diflorasone Diacetate Cream

This article is compiled based on the United States Pharmacopeia (USP) – 2025 Edition

Issued and maintained by the United States Pharmacopeial Convention (USP)

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» Diflorasone Diacetate Cream contains not less than 90.0 percent and not more than 110.0 percent of the labeled amount of C₂₃H₃₂F₂O₇

1 Packaging and storage 

- Preserve in collapsible tubes, preferably at controlled room temperature.

2 USP REFERENCE STANDARDS (11)-

USP Diflorasone Diacetate RS

3 Identification

- The chromatogram of the Assay preparation exhibits a major peak for diflorasone diacetate at a retention time that corresponds to that exhibited in the chromatogram of the Standard preparation obtained in the Assay.

MICROBIAL ENUMERATION TESTS (61), and TESTS FOR SPECIFIED MICROORGANISMS (62)-It meets the requirements of the tests for absence of Staphylococcus aureus and Pseudomonas aeruginosa.

MINIMUM FILL (755)-meets the requirements.

4 Assay-

Mobile phase, Internal standard solution, Standard preparation, and Chromatographic system-Proceed as directed in the Assay under Diflorasone Diacetate.

Assay preparation-Transfer an accurately weighed amount of Cream, equivalent to about 1 mg of diflorasone diacetate, to a suitable container. Add 30.0 mL of Internal standard solution, and shake for about 30 minutes. Centrifuge the solution, and remove and discard the top (excipient) layer. Use the lower, clear chloroform layer.

Procedure-Proceed as directed for Procedure in the Assay under Diflorasone Diacetate. Calculate the quantity, in mg, of diflorasone diacetate (C₂₃H₃₂F₂O₇) in the portion of Cream taken by the formula: 

                0.03C(R_U/R_S)

in which the terms are as defined therein.