1,2-Oxazole-4-sulfonyl chloride CAS 933740-94-4
| CAS No. | 933740-94-4 |
| Molecular Formula | C3H2ClNO3S |
| Molecular Weight | 167.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 1,2-Oxazole-4-sulfonyl chloride 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.
1,2-Oxazole-4-sulfonyl chloride (CAS 933740-94-4), molecular formula C3H2ClNO3S and molecular weight 167.57 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C3H2ClNO3S, 1,2-Oxazole-4-sulfonyl chloride contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 167.57 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C3H2ClNO3S |
| Molecular Weight | 167.57 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, water |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Oxazole Standards
- Oxazole-2-sulfonyl chloride (CAS 184170-50-1)
- 5-Butyl-1,3-oxazole-4-carboxylic acid (CAS 143659-18-1)
- 5-Phenyl-1,3-oxazole-4-carbonitrile (CAS 254880-28-9)
- 2-methyl-1,3-oxazole-4,5-dicarboxylic acid (CAS 855404-45-4)
- Oxazole-2,4-dicarboxylic acid 2-methyl ester (CAS 885704-73-4)
- 4-Phenyl-1,3-oxazole-2-carbaldehyde (CAS 1199623-97-6)
- 2-Phenyl-1,3-oxazole-5-carbaldehyde (CAS 92629-13-5)
- 2-Ethyl-1,3-oxazole-4-carbonyl chloride (CAS 1858241-93-6)
Recommended Standards
- 1H-1,2,3-Triazole-5-sulfonyl chloride (CAS 895132-46-4)
- 5-Chloro-1,1-dioxo-isothiazol-3-one (CAS 1239320-63-8)
- 4H-1,2,4-triazole-3-sulfonyl chloride (CAS 6461-29-6)
- 2H-1,2,3-Triazole-4-sulfonyl chloride (CAS 1106727-22-3)
- Cyclopropylisocyanide (CAS 63609-01-8)
- 2-(1H-imidazol-1-yl)propanoic acid (CAS 753489-91-7)
- 4-Hydroxy-6-methyl-2-oxo-1,2-dihydroquinoline-3-carbaldehyde (CAS 156992-48-2)
- ((2R,3S,4R,5R)-5-(2,6-Dihydroxy-8-oxo-7H-purin-9(8H)-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl dihydrogen phosphate (CAS 21082-31-5)
- (R)-1,2-Pentanediol (CAS 108340-61-0)
- 4-Chlorothiophene-2-sulfonyl chloride (CAS 1016315-26-6)
- 1-(5-Fluoro-2-phenoxyphenyl)-N-methylmethanamine (CAS 476310-75-5)
- 1-(3-Methoxyphenyl)ethyl 1H-pyrazole-4-carboxylate (CAS 88585-22-2)
- Tetradecyl Ether (CAS 5412-98-6)
- Tau Peptide (273-284) trifluoroacetate salt (CAS 1663490-91-2)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com