Methyl 5-(chlorosulfonyl)isoxazole-3-carboxylate CAS 1909326-52-8
| CAS No. | 1909326-52-8 |
| Molecular Formula | C5H4ClNO5S |
| Molecular Weight | 225.61 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a carbohydrate-derived structure, an amide group, a sulfone group, chlorine substitution, Methyl 5-(chlorosulfonyl)isoxazole-3-carboxylate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 225.61 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO supplies Methyl 5-(chlorosulfonyl)isoxazole-3-carboxylate (CAS 1909326-52-8), a certified reference material (molecular formula C5H4ClNO5S, MW 225.61 g/mol) for analytical method development and quality control.
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.
As a certified reference material (CRM), Methyl 5-(chlorosulfonyl)isoxazole-3-carboxylate meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C5H4ClNO5S |
| Molecular Weight | 225.61 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1995 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Methyl Standards
- 3-(chlorosulfonyl)propane-1-sulfonyl fluoride (CAS 1803571-16-5)
- Methyl 2-(chlorosulfonyl)cyclopent-1-ene-1-carboxylate (CAS 87631-72-9)
- Methyl 2-(chlorosulfonyl)furan-3-carboxylate (CAS 1011241-51-2)
- 4-(Chlorosulfonyl)-5-methylfuran-2-carboxylic acid (CAS 1016760-03-4)
- 4-(chlorosulfonyl)-5-methyl-1H-pyrazole-3-carboxylic acid (CAS 1486497-42-0)
- Methyl 5-(Chlorosulfonyl)-1H-pyrazole-4-carboxylate (CAS 1532000-54-6)
- Methyl 5-(chlorosulfonyl)furan-2-carboxylate (CAS 69816-05-3)
- 5-(Chlorosulfonyl)thiophene-2-carboxylic acid (CAS 10216-12-3)
Recommended Standards
- 1-methyl-4-nitro-1H-pyrazole-3-sulfonyl chloride (CAS 1697720-32-3)
- 2-Chloro-5-sulfamoylfuran-3-carboxylic acid (CAS 2138410-16-7)
- 1-(4-Chloro-3-fluorophenyl)-1H-1,2,3-triazole-4-carbaldehyde (CAS 1492834-85-1)
- 5-Chloro-4-sulfamoylfuran-2-carboxylic acid (CAS 2138426-93-2)
- 2-(Hydroxyimino)propanal oxime compound with 1,1-bis(2-methoxyphenyl)propan-2-one (1:1) (CAS 43021-97-2)
- 2-Ethyl-5-phenylfuran (CAS 57044-49-2)
- 2-Boc-aminomethyl-pyrrolidine (CAS 149649-58-1)
- 3-Ethenyl-4H-1,2,4-triazole (CAS 61230-89-5)
- N'-((1H-Indol-3-yl)methylene)-2-((4-chlorobenzyl)oxy)benzohydrazide (CAS 348584-76-9)
- 3,4-Diamino-1H-pyrazol-5(4H)-one (CAS 45514-28-1)
- 4,6-Dichloro-2-(1-methoxyethyl)pyrimidine (CAS 1538944-73-8)
- Zinc phthalocyanine (CAS 14320-04-8)
- 2-(1-Aminoethyl)-5-chlorobenzimidazole Hydrochloride (CAS 2097800-60-5)
- Exenatide Acetate (CAS 141732-76-5)
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