57526-28-0 Butanoyl chloride, 2-methyl- (RS)-2-Methylbutyryl chloride EINECS 260-787-3 CAS 57526-28-0
| CAS No. | 57526-28-0 |
| Molecular Formula | C5H9ClO |
| Molecular Weight | 120.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 57526-28-0 Butanoyl chloride, 2-methyl- (RS)-2-Methylbutyryl chloride EINECS 260-787-3 (C5H9ClO) contains a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 1.0, corresponding to approximately 1 ring(s) or double-bond equivalent(s). With a molecular weight of 120.58 g/mol, it falls into the low-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
57526-28-0 Butanoyl chloride, 2-methyl- (RS)-2-Methylbutyryl chloride EINECS 260-787-3 (CAS 57526-28-0) is a high-purity analytical reference standard with the molecular formula C5H9ClO and a molecular weight of 120.58 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C5H9ClO |
| Molecular Weight | 120.58 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 | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1973 |
| Halogen Content | Cl-containing |
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