MilliporeSigma
All Photos(1)

Documents

155268

Sigma-Aldrich

(R)-(+)-α-Methoxy-α-trifluoromethylphenylacetic acid

99%

Sign Into View Organizational & Contract Pricing

Synonym(s):
(+)-MTPA, Mosher’s acid
Linear Formula:
C6H5C(OCH3)(CF3)CO2H
CAS Number:
Molecular Weight:
234.17
Beilstein/REAXYS Number:
3591560
EC Number:
MDL number:
PubChem Substance ID:

Quality Level

assay

99%

form

solid

optical activity

[α]20/D +72°, c = 1.6 in methanol

optical purity

ee: 99% (GLC)

refractive index

n20/D 1.473 (lit.)

bp

105-107 °C/1 mmHg (lit.)

mp

46-49 °C (lit.)

density

1.344 g/mL at 25 °C (lit.)

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-/m1/s1

InChI key

JJYKJUXBWFATTE-SECBINFHSA-N

Looking for similar products? Visit Product Comparison Guide

Compare Similar Items

View Full Comparison

Show Differences

1 of 4

This Item
M2876318035M89617
(±)-α-Methoxyphenylacetic acid crystalline

M2876

(±)-α-Methoxyphenylacetic acid

Mucic acid 97%

M89617

Mucic acid

refractive index

n20/D 1.473 (lit.)

refractive index

-

refractive index

n20/D 1.474 (lit.)

refractive index

-

form

solid

form

crystalline

form

-

form

powder

storage temp.

2-8°C

storage temp.

-

storage temp.

2-8°C

storage temp.

-

density

1.344 g/mL at 25 °C (lit.)

density

-

density

1.303 g/mL at 25 °C (lit.)

density

-

mp

46-49 °C (lit.)

mp

69-71 °C (lit.)

mp

46-49 °C (lit.)

mp

220-225 °C (dec.) (lit.)

Application

(R)-(+)-α-Methoxy-α-trifluoromethylphenylacetic acid is commonly used as a derivatizing agent in Mosher ester analysis, an NMR-based method for determining the absolute configuration of the chiral carbon center in a secondary alcohol.

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

Other Notes

doi:10.1038/nprot.2007.354

pictograms

Exclamation mark

signalword

Warning

Hazard Classifications

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

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk_germany

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


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).

Example:

T1503
Product Number
-
25G
Pack Size/Quantity

Additional examples:

705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Customers Also Viewed

Slide 1 of 1

1 of 1

Lidia De Luca et al.
The Journal of organic chemistry, 72(10), 3955-3957 (2007-04-11)
An effective route to chiral optically active 2-substituted benzofurans directly from carboxylic acids is reported. This procedure, which allows the preparation of alpha-alkyl-2-benzofuranmethanamines from N-protected alpha-amino acids without sensible racemization phenomena, proceeds in good yields under mild conditions with the
Tetrahedron Asymmetry, 18, 975-975 (2007)
Mosher ester analysis for the determination of absolute configuration of stereogenic (chiral) carbinol carbons.
Hoye TR, et al.
Nature Protocols, 2(10), 2451-2458 (2007)
J Martín Torres-Valencia et al.
Phytochemical analysis : PCA, 13(6), 329-332 (2002-12-24)
A method to determine the absolute configuration of 2,3-epoxy-2-methylbutanoate ester residues in natural products is presented, based on (i) the reduction of the ester function to yield a 2-methyl-1,2-butanediol, (ii) esterification of the obtained primary alcohol with either (R)-(+)- or
Giancarlo Cravotto et al.
Chirality, 16(8), 526-533 (2004-08-04)
Cyclodextrin (CD) derivatives are important selectors for analytical chiral recognition. Their enantioselectivities and chemical properties depend on ring size and on nature, number and location of substituents. This paper describes the synthesis of 6-O-TBDMS-2,3-O-methyl beta-cyclodextrins bearing in position 2 either

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service