5-Bromo-5-deoxy-2-c-methyl-2,3-O-(1-methylethylidene)-D-ribonic-gamma-lactone CAS 157666-07-4
| CAS No. | 157666-07-4 |
| Molecular Formula | C9H13BrO4 |
| Molecular Weight | 265.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
5-Bromo-5-deoxy-2-c-methyl-2,3-O-(1-methylethylidene)-D-ribonic-gamma-lactone (CAS 157666-07-4) is a high-purity analytical reference standard with the molecular formula C9H13BrO4 and a molecular weight of 265.10 g/mol.
Structurally, 5-Bromo-5-deoxy-2-c-methyl-2,3-O-(1-methylethylidene)-D-ribonic-gamma-lactone (C9H13BrO4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 265.10 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
CATO manufactures 5-Bromo-5-deoxy-2-c-methyl-2,3-O-(1-methylethylidene)-D-ribonic-gamma-lactone under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H13BrO4 |
| Molecular Weight | 265.10 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2002 |
| Halogen Content | Br-containing |
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Why CATO?
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- 130,000+ catalog items in stock, COA supplied with every batch
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