Bis(trimethylsilyl)trifluoroacetamide
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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)
(N,O-Bis(trimethylsilyl) trifluoroacetamide; BSTFA), CF3CON[Si(CH3)3]2 257.40 CAS RN®: 25561-30-2-Clear, colorless liquid. Readily hydrolyzes when exposed to moist air. Store in a cool place.
ASSAY: Not less than 98% of CF3CON[Si(CH3)3]2, a suitable gas chromatograph equipped with a thermal conductivity detector being used. The following conditions are suitable and provide a retention time of approximately 15 minutes.
Column: 3-mm x 1.83-m stainless steel containing 5% phase G1 on support S1A
Injection temperature: 170°
Column temperature: 70°, programmed to rise 4° per minute to 140°
Carrier gas: Helium
REFRACTIVE INDEX (831): between 1.3820 and 1.3860 at 20°.
