4-Methyl-1,2,3-thiadiazole-5-carbonyl chloride 4-methyl-[1,2,3]thiadiazole-5-carbonyl chloride 5-Chlorocarbonyl-4-methyl-1,2,3-thiadiazole 59944-65-9 CAS 59944-65-9
| CAS No. | 59944-65-9 |
| Molecular Formula | C4H3ClN2OS |
| Molecular Weight | 162.60 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-Methyl-1,2,3-thiadiazole-5-carbonyl chloride 4-methyl-[1,2,3]thiadiazole-5-carbonyl chloride 5-Chlorocarbonyl-4-methyl-1,2,3-thiadiazole 59944-65-9 (CAS 59944-65-9), molecular formula C4H3ClN2OS and molecular weight 162.60 g/mol, is a CATO reference standard with documented purity and traceability.
4-Methyl-1,2,3-thiadiazole-5-carbonyl chloride 4-methyl-[1,2,3]thiadiazole-5-carbonyl chloride 5-Chlorocarbonyl-4-methyl-1,2,3-thiadiazole 59944-65-9 (C4H3ClN2OS) contains an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C4H3ClN2OS |
| Molecular Weight | 162.60 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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 |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1974 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Methyl Standards
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Recommended Standards
- 5-Chlorothiazole-2-carboxamide (CAS 98027-07-7)
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- 2-methyltetrahydropyran-2-carbonyl chloride (CAS 115261-81-9)
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- Methyl 3-(2-((tert-butoxycarbonyl)amino)ethyl)benzoate (CAS 179003-02-2)
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- (E)-{1-[2-(4-chlorophenyl)-4-methyl-1,3-thiazol-5-yl]ethylidene}amino N-phenylcarbamate (CAS 477872-50-7)
- 3-(5-(2-(Trifluoromethyl)phenyl)furan-2-yl)propanoic acid (CAS 853310-21-1)
- Ethyl (tosylmethyl)carbamate (CAS 2850-26-2)
- Ethyl 5-aminobenzofuran-2-carboxylate hydrochloride (CAS 183288-42-8)
- 6-Amino-8-ethyl-3,4-dihydroquinolin-2(1H)-one (CAS 2855920-88-4)
- 2 6-bis-(N N-dibutylÂureidoÂ)toluene (CAS 63785-40-0)
- Semaglutide impurity 108 (CAS CATO-C4X-2226108)
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