Sudan III
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This article is compiled based on the United States Pharmacopeia (USP) – 2025 Edition
Issued and maintained by the United States Pharmacopeial Convention (USP)
C22H16N4O 352.39 CAS RN®: 85-86-9.—Red to red-brown powder. Use a suitable grade.
Assay: When tested by thin-layer chromatography (see Chromatography〈621〉) with the use of plates coated with chromatographic silica gel mixture and a developing system consisting of a mixture of hexane and ethyl acetate (80:20), and examined under short-wavelength UV light, a single spot is exhibited, with trace impurities.
