2-Methanesulfonyl-2-methylpropanoyl chloride CAS 1017540-45-2
| CAS No. | 1017540-45-2 |
| Molecular Formula | C5H9ClO3S |
| Molecular Weight | 184.64 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, 2-Methanesulfonyl-2-methylpropanoyl chloride is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 184.64 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.
2-Methanesulfonyl-2-methylpropanoyl chloride (CAS 1017540-45-2), molecular formula C5H9ClO3S and molecular weight 184.64 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C5H9ClO3S |
| Molecular Weight | 184.64 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 1.0 |
| CAS Registry Year (est.) | 1988 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Methanesulfonyl Standards
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Recommended Standards
- N-(Azetidin-3-yl)-3-chloropyrazin-2-amine (CAS 2091550-19-3)
- 1-methyl-1H-pyrazole-5-sulfonyl chloride (CAS 1020721-61-2)
- 6-chloro-2,3-dimethyl-1H,2H,3H-pyrazolo[3,4-d]pyrimidine (CAS 2721934-21-8)
- 1-Chloro-7-fluoro-1,2,3,4-tetrahydronaphthalene (CAS 1082399-51-6)
- DDe-l-alaninol (CAS 1272755-17-5)
- N6-[(3,4-Dichlorophenyl)methyl]-N6-nitroso-2,4,6-quinazolinetriamine (CAS 22316-71-8)
- 2-Formyl-6-methoxyphenyl 4-chlorobenzoate (CAS 431980-24-4)
- N,1-Dimethyl-5-oxo-2,5-dihydro-1H-pyrazole-3-carboxamide (CAS 185451-43-8)
- 4-Amino-1-ethoxybutan-2-ol (CAS 166746-56-1)
- (S)-Benzyl 3-cyanopiperidine-1-carboxylate (CAS 1359722-09-0)
- Ethyl 4-(4-fluorophenoxy)-2-phenylpyrimidine-5-carboxylate (CAS 477854-81-2)
- 6-Methylimidazo[2,1-b]thiazole-3-carboxylic acid hydrochloride (CAS 1269052-79-0)
- (2-Amino-5-chloro-phenyl)-carbamic acid tert-butyl ester (CAS 954238-88-1)
- Tirzepatide Impurity 35 (CAS CATO-C4X-324035)
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