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318035

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

≥99%

Synonym(s):

(−)-MTPA, Mosher’s acid

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About This Item

Linear Formula:
C6H5C(OCH3)(CF3)CO2H
CAS Number:
17257-71-5
Molecular Weight:
234.17
UNSPSC Code:
12352112
NACRES:
NA.22
PubChem Substance ID:
24859111
EC Number:
241-292-1
Beilstein/REAXYS Number:
4684048
MDL number:
MFCD00064200
Assay:
≥99%
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Quality Segment

200

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.)

functional group

carboxylic acid, ether, fluoro, phenyl

storage temp.

2-8°C

SMILES string

CO[C@](C(O)=O)(c1ccccc1)C(F)(F)F

InChI

1S/C10H9F3O3/c1-16-9(8(14)15,10(11,12)13)7-5-3-2-4-6-7/h2-6H,1H3,(H,14,15)/t9-/m0/s1

InChI key

JJYKJUXBWFATTE-VIFPVBQESA-N

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.

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

Other Notes

doi:10.1038/nprot.2007.354

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pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

235.4 °F - closed cup

flash_point_c

113 °C - closed cup

ppe

dust mask type N95 (US), Eyeshields, Gloves

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