4-Chlorothiazole-2-sulfonamide CAS 89501-94-0
| CAS No. | 89501-94-0 |
| Molecular Formula | C3H3ClN2O2S2 |
| Molecular Weight | 198.65 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-Chlorothiazole-2-sulfonamide (CAS 89501-94-0), molecular formula C3H3ClN2O2S2 and molecular weight 198.65 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C3H3ClN2O2S2, 4-Chlorothiazole-2-sulfonamide 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 198.65 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 | C3H3ClN2O2S2 |
| Molecular Weight | 198.65 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 DMSO, DMF, methanol |
| 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.) | 1982 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related Chlorothiazole Standards
- Ethyl 2-Chlorothiazole-4-carboxylate (CAS 41731-52-6)
- Ethyl 2-Chlorothiazole-5-carboxylate (CAS 81449-93-6)
- Ethyl 4-chlorothiazole-5-carboxylate (CAS 444909-55-1)
- Ethyl 5-chlorothiazole-4-carboxylate (CAS 425392-45-6)
- 4-Chlorothiazole-5-carbonyl chloride (CAS 1133931-01-7)
- 2-Chlorothiazole-5-sulfonyl chloride (CAS 88917-11-7)
- 4-Chlorothiazole-2-sulfonyl chloride (CAS 89501-96-2)
- 5-Chlorothiazole-2-sulfonyl chloride (CAS 959997-70-7)
Recommended Standards
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- 4-Ethoxy-N-hydroxybenzimidoyl chloride (CAS 61946-89-2)
- 5-Chloro-N-(5-methylisoxazol-3-yl)-2-(methylthio)pyrimidine-4-carboxamide (CAS 898646-97-4)
- 1-o-octadecyl-2-hydroxy-sn-glycero-3-phosphate ammonium salt 799279-67-7 (CAS 799279-67-7)
- 1-Ethyl-N-(tetrahydro-2h-thiopyran-4-yl)-1h-pyrazol-4-amine (CAS 1155066-29-7)
- 4-Phenyl-1,3-thiazol-5-amine (CAS 412311-69-4)
- N,N-dimethyl-4-(((4-nitrophenyl)imino)methyl)aniline (CAS 896-05-9)
- 2-Bromo-6-chloroisonicotinic acid (CAS 1060811-26-8)
- Ethyl 2-ethyl-1,6-dioxaspiro[2.6]nonane-2-carboxylate (CAS 1544847-49-5)
- 3-Methylthiazolidine-4-carboxylic acid hydrochloride (CAS 105087-82-9)
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