(S)-(-)-alpha-Methoxy-alpha-(trifluoromethyl)phenylacetic acid
[CAS# 17257-71-5]

Identification

• Classification: Analytical chemistry >> Analytical reagent >> Common analytical reagents
• Name: (S)-(-)-alpha-Methoxy-alpha-(trifluoromethyl)phenylacetic acid
• Synonyms: Mosher's Acid; (-)-MTPA
• Molecular Formula: C₁₀H₉F₃O₃
• Molecular Weight: 234.17
• CAS Registry Number: 17257-71-5
• EC Number: 241-292-1

Properties

• Density: 1.303
• Melting point: 46-49 ºC
• Boiling point: 95-97 ºC (0.05 mmHg)
• Refractive index: 1.474
• Flash point: 113 ºC

Safety Data

• Hazard Symbols: Xi
• Risk Codes: R36/37/38
• Safety Description: S26;S36

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Eye irritation	Eye Irrit.	2	H319
Skin irritation	Skin Irrit.	2	H315
Specific target organ toxicity - single exposure	STOT SE	3	H335