155268

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

99%

• Synonym(s): (+)-MTPA, Mosher’s acid
• Linear Formula: C₆H₅C(OCH₃)(CF₃)CO₂H
• CAS Number: 20445-31-2
• Molecular Weight: 234.17
• Beilstein: 3591560
• EC Number: 243-829-5
• MDL number: MFCD00004184
• UNSPSC Code: 12352112
• PubChem Substance ID: 24849508
• NACRES: NA.22

Properties

• 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

Description

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

Safety Information

• Pictograms: GHS07
• Signal Word: Warning
• Hazard Statements: H315,H319,H335
• Precautionary Statements: P261 - P264 - P271 - P280 - P302 + P352 - P305 + P351 + P338
• Hazard Classifications: Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
• Target Organs: Respiratory system
• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): 235.4 °F - closed cup
• Flash Point(C): 113 °C - closed cup
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves