2,5-Dimethoxybenzaldehyde
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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)
C9H10O3 166.17 CAS RN®: 93-02-7.—Off-white crystals.
Assay: Inject an appropriate specimen into a suitable gas chromatograph (see Chromatography 〈621〉) equipped with a flame-ionization detector, nitrogen being used as the carrier gas. The following conditions have been found suitable: a 0.3-mm × 30-m capillary column coated with phase G1; the injection port temperature is maintained at 270°; the detector temperature is maintained at 300°; the column temperature is maintained at 150° and programmed to rise 10° per minute to 270°. The area of the main peak is not less than 97% of the total peak area.
Melting Range〈741〉: between 50° and 52°.
