(R)-2-Methylbutyric Acid

RT

102, 13

Clear Colorless to Light Brown Oil

(R)-2-Methylbutyric Acid is a metabolite of Ethyl (E)-2-methyl-2-butenoate (Ethyl tiglate), an important aroma compound in apples and serves as an indicator for genuineness of apple products due to its high optical purity of greater than 98% enantiomeric excess.

Synonyms:
(2R)-2-Methylbutanoic Acid; (-)-2-Methylbutanoic Acid; (R)-(-)-2-Methylbutanoic Acid

CAS No:
32231-50-8

Molecular Formula:
C₅H₁₀O₂

Molecular Weight:
102.13

Appearance:
Clear Colorless to Light Brown Oil

Purity:
≥97%

Solubility:
Chloroform, Methanol

Method for Determining Identity:
Proton NMR (CDCl3) Spectroscopic and Mass Spectrometric Analysis

TLC Conditions:
SiO2; Dichloromethane: Methanol=9:1; Visualized with KMnO4; Single Spot, Rf=0.50

Elemental Analysis:
As Reported

Specific Rotation:
-17.8° (c=1, chloroform)

Storage and Stability:
May be stored at RT for short-term only. Long-term storage is recommended at 4°C. Stable for 6 months after receipt.. For maximum recovery of product, centrifuge the original vial prior to removing the cap.