2,4,6-Trimethylpyridine
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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)
(5-Collidine), C8H11N 121.18 CAS RN®: 108-75-8.—Clear, colorless liquid. Soluble in cold water and less soluble in hot water; soluble in alcohol, in chloroform, and in methanol. Miscible with ether.
Assay: Inject an appropriate test specimen into a suitable gas chromatograph (see Chromatography〈621〉), helium being used as a carrier gas.
The following conditions have been found suitable: a 3-mm × 1.85-m stainless steel column containing phase G16 on support S1A; the
injection port, column, and detector temperatures are maintained at 180°, 165°, and 270°, respectively; and a flame-ionization detector is used.
The area of the C8H11N peak is not less than 98% of the total peak area.
Refractive Index〈831〉: between 1.4970 and 1.4990, at 20°.
