4-oxo-3,4-dihydro-2H-1-benzopyran-6-sulfonyl chloride CAS 503470-40-4
| CAS No. | 503470-40-4 |
| Molecular Formula | C9H7ClO4S |
| Molecular Weight | 246.67 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4-oxo-3,4-dihydro-2H-1-benzopyran-6-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.
4-oxo-3,4-dihydro-2H-1-benzopyran-6-sulfonyl chloride (CAS 503470-40-4), molecular formula C9H7ClO4S and molecular weight 246.67 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H7ClO4S, 4-oxo-3,4-dihydro-2H-1-benzopyran-6-sulfonyl chloride contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 246.67 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H7ClO4S |
| Molecular Weight | 246.67 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.) | 1984 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
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Recommended Standards
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- 5-Chloro-2-(4-fluorophenyl)-1H-benzo[d]imidazole (CAS 21627-71-4)
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- 2-(3-(3-Methyl-1,2,4-oxadiazol-5-yl)propyl)isoindoline-1,3-dione (CAS 173336-84-0)
- 4-(Pyridin-4-yl)-1H-indole-3-carbaldehyde (CAS 108378-89-8)
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- 5-Bromo-N-(diphenylmethylene)-2-pyrimidinamine (CAS 1072850-89-5)
- 2-Bromo-3-(difluoromethyl)-6-fluoroisonicotinic acid (CAS 1805398-12-2)
- 4-(But-3-en-1-yl)-1,2-dichlorobenzene (CAS 3047-23-2)
- 1-Fluoro-2-(trichloromethoxy)benzene (CAS 1404194-87-1)
- 5-(Trifluoromethyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7(4H)-one (CAS 299918-83-5)
- (Ser(PO?H?)2?2)-Tau Peptide (260-264) PAb Blocking trifluoroacetate salt (CAS 2022956-57-4)
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