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016637 (R)-2-Methylbutyric Acid CAS: 32231-50-8

Specifications
References
CAS Number
32231-50-8
Grade
Highly Purified
Molecular Formula
C5H10O2
Molecular Weight
102.13
EU Commodity Code
38220090
UN DOT Shipping
UN3265 PGIII
Shipping Temp
RT
Storage Temp
4°C
(2R)-2-Methylbutanoic Acid; (-)-2-Methylbutanoic Acid; (R)-(-)-2-Methylbutanoic Acid

(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.
Important Note
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.
Toxicity and Hazards
 All products should be handled by qualified personnel only, trained in laboratory procedures.
References
Ikeda, Y., et al.: J. Biol. Chem., 258, 9477 (1983), Schumacher, K., et al.: J. Agric. Food Chem., 46, 4496 (1998), Beuerle, T., et al.: Lipids, 34, 375 (1999)
USBio References
No references available
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