(S)-Methyl 2-chlorobutanoate CAS 692753-51-8
| CAS No. | 692753-51-8 |
| Molecular Formula | C5H9ClO2 |
| Molecular Weight | 136.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of (S)-Methyl 2-chlorobutanoate is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
(S)-Methyl 2-chlorobutanoate (CAS 692753-51-8), molecular formula C5H9ClO2 and molecular weight 136.58 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, (S)-Methyl 2-chlorobutanoate is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 136.58 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), (S)-Methyl 2-chlorobutanoate meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C5H9ClO2 |
| Molecular Weight | 136.58 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Cl-containing |
Recommended Standards
- (S)-2-Chloropentanoic acid (CAS 32644-12-5)
- [3-(chloromethyl)oxetan-3-yl]methanol (CAS 4351-77-3)
- (S)-2-Chloro-3-methylbutyric Acid (CAS 26782-74-1)
- 1-(2-Chloroethyl)-3-methylurea (CAS 74378-14-6)
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- 4-((4-Hydroxy-6-methylpyrimidin-2-yl)amino)benzoic acid (CAS 99989-32-9)
- 59880-97-6 Chemotactic peptide F-Met-Leu-Phe L-Phenylalanine, N-(N-(N-formyl-L-methionyl)-L-leucyl)- N-Formyl-L-methionyl-L-leucyl-L-phenylalanine N-Formyl-Met-Leu-Phe N-Formylmethionine leucyl-phenylalanine fMLF fMLP (misnomer but widely used) (CAS 59880-97-6)
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