Methyl Stearate

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Methyl Stearate

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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)

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C19H38O2         298.50       CAS RN®: 112-61-8.-Off-white, crystalline solid.

Assay: Inject an appropriate specimen into a suitable 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 capillary column coated with a 1-µm layer of phase G2; the injection port temperature is maintained at 300°; the detector temperature is maintained at 300°; the column temperature is maintained at 200° and programmed to rise 10° per minute to 300°. The area of the C19H38O2 peak is not less than 99% of the total peak area. 

MELTING RANGE (741): between 40° and 42°.

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