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318035 Aldrich

(S)-(−)-α-Methoxy-α-(trifluoromethyl)phenylacetic acid

≥99%

Synonym: (−)-MTPA, Mosher’s acid

  • CAS Number 17257-71-5

  • Linear Formula C6H5C(OCH3)(CF3)CO2H

  • Molecular Weight 234.17

  •  Beilstein Registry Number 4684048

  •  EC Number 241-292-1

  •  MDL number MFCD00064200

  •  PubChem Substance ID 24859111

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Properties

Related Categories Asymmetric Synthesis, Carboxylic Acids, Chemical Synthesis, Chiral Building Blocks, Chiral Resolution Reagents,
InChI Key   JJYKJUXBWFATTE-VIFPVBQESA-N
assay   ≥99%
optical activity   [α]18/D −72°, c = 1.6 in methanol
optical purity   ee: 99% (GLC)
refractive index   n20/D 1.474(lit.)
bp   95-97 °C/0.05 mmHg(lit.)
mp   46-49 °C(lit.)
density   1.303 g/mL at 25 °C(lit.)
storage temp.   2-8°C

Description

Other Notes

doi:10.1038/nprot.2007.354

Packaging

1 g in glass bottle

250 mg in glass bottle

Bottomless glass bottle. Contents are inside inserted fused cone.

General description

(S)-(-)-α-Methoxy-α-(trifluoromethyl)phenylacetic acid is commonly used as a derivatizing agent in Mosher ester analysis and Mosher amide analysis, which are NMR-based methods for determining the absolute configuration of the chiral carbon center in secondary alcohols and amines, respectively.

Safety & Documentation

Safety Information

Symbol 
GHS07  GHS07
Signal word 
Warning
Hazard statements 
Precautionary statements 
Personal Protective Equipment 
RIDADR 
NONH for all modes of transport
WGK Germany 
3
Flash Point(F) 
235.4 °F
Flash Point(C) 
113 °C

Screeing simplified
Protocols & Articles
Peer-Reviewed Papers
15

References

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