2,3-Dihydro-2-oxo-1H-benzimidazole-5-sulfonyl chloride hydrochloride CAS 1965305-11-6
| CAS No. | 1965305-11-6 |
| Molecular Formula | C7H5ClN2O3S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 2,3-Dihydro-2-oxo-1H-benzimidazole-5-sulfonyl chloride hydrochloride is closely related to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
2,3-Dihydro-2-oxo-1H-benzimidazole-5-sulfonyl chloride hydrochloride (CAS 1965305-11-6), molecular formula C7H5ClN2O3SHCl and molecular weight 269.10 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C7H5ClN2O3SHCl, 2,3-Dihydro-2-oxo-1H-benzimidazole-5-sulfonyl chloride hydrochloride contains an amide group, 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 269.10 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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C7H5ClN2O3S HCl |
| Molecular Weight | 269.10 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, 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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Recommended Standards
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- n2-(4-(Trifluoromethyl)phenyl)pyrimidine-2,5-diamine (CAS 1291798-89-4)
- 4-(Chloromethyl)-6-ethoxy-2H-chromen-2-one (CAS 933916-95-1)
- 2-Benzyl 5-(tert-butyl) 2,5-diazabicyclo[4.1.0]Heptane-2,5-dicarboxylate (CAS 1228675-28-2)
- Insulin Degludec Impurity 8 (CAS CATO-C4X-21578)
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