4-chloro-2-oxo-2H-chromene-3-sulfonyl chloride CAS 18633-79-9
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 18633-79-9 |
| Molecular Formula | C9H4Cl2O4S |
| Molecular Weight | 279.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4-chloro-2-oxo-2H-chromene-3-sulfonyl chloride (CAS 18633-79-9), a pharmaceutical standards reference standard manufactured under ISO 17034 accreditation. Molecular formula: C9H4Cl2O4S. Molecular weight: 279.10 g/mol. Batch-specific COA and technical support are available on request.
Physical & Chemical Properties
| Molecular Formula | C9H4Cl2O4S |
| Molecular Weight | 279.10 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
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Recommended Standards
- 5'-Bromo-2'-fluoro-[1,1'-biphenyl]-3-carbaldehyde (CAS 1528977-92-5)
- [2-Nitro-5-(tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]methanol (CAS 1874163-36-6)
- 5'-Bromo-2'-fluoro-[1,1'-biphenyl]-4-carbaldehyde (CAS 1517104-26-5)
- 2-(2-Methoxynaphthalen-1-yl)cyclopropan-1-amine (CAS 1157555-86-6)
- 6-Cyano-1H-indole-2-carboxamide (CAS 877998-60-2)
- Ethyl 4-(4-methoxy-3-methylphenyl)-4-oxobutanoate (CAS 2954-68-9)
- Prochlorperazine Impurity 13 (CAS 1207-99-4)
- 4-Methoxy-3-methyl-N-(thiophen-3-ylmethyl)benzenesulfonamide (CAS 1060282-33-8)
- Octreotide EP Impurity G Acetate (CAS 108102-47-2（free base）)
- Fragment-[9-31]-Semaglutide (CAS CATO-C4X-2226181)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
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