(S)-(+)-2-Methylbutyric acid
- CAS NO.：1730-91-2
- Empirical Formula: C5H10O2
- Molecular Weight: 102.13
- MDL number: MFCD00063166
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-28 02:21:36
What is (S)-(+)-2-Methylbutyric acid?
Chemical properties
clear colorless liquid
The Uses of (S)-(+)-2-Methylbutyric acid
(S)-(+)-2-Methylbutyric Acid is a chiral starting reagent used in various synthetic preparations.
The Uses of (S)-(+)-2-Methylbutyric acid
(S)-(+)-2-Methylbutyric acid may be used in the preparation of the stereoisomers of (R)-lavandulyl (S)-2-methylbutanoate and (R)-maconelliyl (S)-2-methylbutanoate, which are female sex pheromones found in pink hibiscus mealybug.
Definition
ChEBI: The (S)-enantiomer of 2-methylbutanoic acid.
Purification Methods
Purify the acid by distilling it in vacuo [Sax & Bergmann J Am Chem Soc 77 1910 1955, Doering & Aschner J Am Chem Soc 75 393 1953 ]. The methyl ester is formed by addition of diazomethane and has b 112-115o/760mm, [] D +21.1o (c 1.7, MeOH). [Beilstein 2 IV 888.]
Properties of (S)-(+)-2-Methylbutyric acid
| Melting point: | -55°C |
| Boiling point: | 78 °C/15 mmHg (lit.) |
| alpha | 19 º (c=neat) |
| Density | 0.938 g/mL at 25 °C (lit.) |
| refractive index | n |
| FEMA | 2695 | 2-METHYLBUTYRIC ACID |
| Flash point: | 165 °F |
| storage temp. | 2-8°C |
| solubility | Chloroform (Sparingly), Methanol (Sparingly) |
| pka | 4.80±0.10(Predicted) |
| form | Liquid |
| color | Clear colorless |
| Odor | fruity sweet |
| optical activity | [α]20/D +19°, neat |
| BRN | 1720485 |
| Stability: | Hygroscopic |
| CAS DataBase Reference | 1730-91-2(CAS DataBase Reference) |
Safety information for (S)-(+)-2-Methylbutyric acid
| Signal word | Danger |
| Pictogram(s) |
 Corrosion Corrosives GHS05 |
| GHS Hazard Statements |
H314:Skin corrosion/irritation |
| Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. P363:Wash contaminated clothing before reuse. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P405:Store locked up. |
Computed Descriptors for (S)-(+)-2-Methylbutyric acid
| InChIKey | WLAMNBDJUVNPJU-BYPYZUCNSA-N |
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