(5-Chloro-1,3-benzoxazol-2-yl)methanesulfonyl chloride CAS 73943-89-2
| CAS No. | 73943-89-2 |
| Molecular Formula | C8H5Cl2NO3S |
| Molecular Weight | 266.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including (5-Chloro-1,3-benzoxazol-2-yl)methanesulfonyl chloride.
(5-Chloro-1,3-benzoxazol-2-yl)methanesulfonyl chloride (CAS 73943-89-2) is a high-purity analytical reference standard with the molecular formula C8H5Cl2NO3S and a molecular weight of 266.10 g/mol.
Structurally, (5-Chloro-1,3-benzoxazol-2-yl)methanesulfonyl chloride (C8H5Cl2NO3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 266.10 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures (5-Chloro-1,3-benzoxazol-2-yl)methanesulfonyl chloride 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 | C8H5Cl2NO3S |
| Molecular Weight | 266.10 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Chloro Standards
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Recommended Standards
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- (6-(3-Hydroxypyrrolidin-1-yl)pyridin-2-yl)boronic acid (CAS 1310404-11-5)
- 1,1,1-Trichloro-5,8,11,14-tetraoxa-1-silapentadecane (CAS 228700-87-6)
- N-(tert-butyl)-N-phenyl-4-(trifluoromethyl)benzenesulfonamide (CAS 866154-13-4)
- N-(4-chlorophenyl)-4-((4-chlorophenyl)thio)-2-phenylpyrimidine-5-carboxamide (CAS 477854-76-5)
- Diethyl 4-bromophthalate (CAS 38568-41-1)
- Ethyl 2-acetamidopyrrolidine-1-carboxylate (CAS 121537-91-5)
- 3-Ethyl-2-(trifluoromethyl)phenol (CAS 1243455-95-9)
- 6-Chloro-7-ethyl-2-isopropyl-7H-purine (CAS 1708208-61-0)
- 1-Ethoxy-4-nitroisoquinoline (CAS 103863-04-3)
- Neuropeptide W-23 (human) (CAS 383415-79-0)
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