Carbazole,
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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)
C12H9ON 167.21 CAS RN®: 86-74-8.-Off-white to tan powder.
Assay: Inject an appropriate volume into a gas chromatograph (see Chromatography (621)) equipped with a flame-ionization detector, helium being used as the carrier gas. The following conditions have been found suitable: a 0.25-mm x 30-m capillary column coated with a 1-µm layer of phase G2; the injection port temperature is maintained at 280°; the detector temperature is maintained at 300°; and the column temperature is maintained at 280°. The area of the CHN peak is not less than 95.5% of the total peak area.
