Methyl 1-(chlorosulfonyl)cyclobutane-1-carboxylate CAS 1909305-18-5
| CAS No. | 1909305-18-5 |
| Molecular Formula | C6H9ClO4S |
| Molecular Weight | 212.65 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Methyl 1-(chlorosulfonyl)cyclobutane-1-carboxylate (CAS 1909305-18-5), molecular formula C6H9ClO4S and molecular weight 212.65 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, Methyl 1-(chlorosulfonyl)cyclobutane-1-carboxylate is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 212.65 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C6H9ClO4S |
| Molecular Weight | 212.65 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1995 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Methyl Standards
- Methyl 3-(chlorosulfonyl)cyclobutane-1-carboxylate (CAS 1248799-94-1)
- methyl 2-(chlorosulfonyl)cyclobutane-1-carboxylate (CAS 1595733-28-0)
- methyl 1-[(chlorosulfonyl)methyl]cyclopropane-1-carboxylate (CAS 1820703-07-8)
- 3-[(chlorosulfonyl)(ethyl)amino]-2-methylpropanenitrile (CAS 1247700-03-3)
- Methyl 5-(Chlorosulfonyl)pentanoate (CAS 1408058-14-9)
- Methyl 2-(chlorosulfonyl)-3-methylbutanoate (CAS 144037-05-8)
- Butyl 2-(chlorosulfonyl)acetate (CAS 866128-20-3)
- ethyl 2-(chlorosulfonyl)-2-methylpropanoate (CAS 55896-99-6)
Recommended Standards
- trans-Methyl 3-(chlorosulfonyl)cyclobutanecarboxylate (CAS 1909294-41-2)
- 2-(2-oxooxolan-3-yl)ethane-1-sulfonyl chloride (CAS 1909312-89-5)
- Rel-methyl (1s,3s)-3-(chlorosulfonyl)cyclobutane-1-carboxylate (CAS 1932811-28-3)
- methyl (1R,2R)-2-(chlorosulfonyl)cyclobutane-1-carboxylate (CAS 1820581-25-6)
- 4,4'-(2,5-Dibromo-1,4-phenylene)dipyridine (CAS 2020402-43-9)
- 1-(4-Methoxy-2-(methoxymethoxy)phenyl)ethan-1-one (CAS 58544-83-5)
- (S)-2-(3-Oxo-1-phenyl-3-(4-(trifluoromethyl)phenyl)propyl)malonic acid (CAS 1410101-91-5)
- 69045-79-0 2-Chloro-5-iodopyridine Pyridine, 2-chloro-5-iodo- BCP22108 (CAS 69045-79-0)
- Tert-butyl 3-(2-amino-5-bromoanilino)azetidine-1-carboxylate (CAS 1471262-49-3)
- 4-Ethyl-N-(pyridin-4-ylmethyl)cyclohexan-1-amine (CAS 864415-62-3)
- 2-Amino-4,6-dimethoxybenzaldehyde (CAS 1379345-56-8)
- Methyl 5-Amino-2-chloronicotinate (CAS 886435-73-0)
- 4-oxo-4-(4-trifluoromethylphenyl)butyronitrile (CAS 61719-33-3)
- Semaglutide impurity 01 (CAS 1998701-31-7)
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