5-((Ethylthio)methyl)isoxazol-3(2H)-one CAS 89660-63-9
| CAS No. | 89660-63-9 |
| Molecular Formula | C6H9NO2S |
| Molecular Weight | 159.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-((Ethylthio)methyl)isoxazol-3(2H)-one (C6H9NO2S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies 5-((Ethylthio)methyl)isoxazol-3(2H)-one (CAS 89660-63-9), a certified reference material (molecular formula C6H9NO2S, MW 159.21 g/mol) for analytical method development and quality control.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 5-((Ethylthio)methyl)isoxazol-3(2H)-one 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 | C6H9NO2S |
| Molecular Weight | 159.21 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1982 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Ethylthio Standards
- 4-(Ethylthio)-5-methylisoxazol-3(2H)-one (CAS 107403-19-0)
- 1-(Ethylthio)pyrrolidine-2,5-dione (CAS 42839-22-5)
- 2-(Ethylthio)-4-methylthiazole (CAS 5316-68-7)
- 3-((Ethylthio)methyl)piperidine (CAS 1248515-68-5)
- 4-((Ethylthio)methyl)piperidine (CAS 1249157-25-2)
- 2-((Ethylthio)methyl)piperidine (CAS 1250043-71-0)
- 2-(Ethylthio)-5-methylthiophene (CAS 6522-11-8)
- (S)-2-((Ethylthio)methyl)furan-3(2H)-one (CAS 92544-23-5)
Recommended Standards
- 4-Isopropyl-5-mercapto-4H-1,2,4-triazol-3-ol (CAS 53065-47-7)
- 5-(methoxymethyl)-2-methylpyrazin-1-ium-1-olate (CAS 83056-59-1)
- 4-Isopropyl-2-thioxooxazolidin-5-one (CAS 34653-99-1)
- 5,5-Dimethyl-4,5-dihydrothiazole-4-carboxylic acid (CAS 740742-98-7)
- (4-(2,2-Difluoroethoxy)phenyl)methanamine (CAS 877151-57-0)
- tert-Butyl(3R,4R)-4-(4-chlorophenyl)-3-hydroxypiperidine-1-carboxylate (CAS 188861-32-7)
- 2-(5-Methyl-3-(p-tolyl)-1H-pyrazol-4-yl)acetic acid (CAS 1273555-20-6)
- 1-(3-Chloro-4-methylphenyl)pentan-1-one (CAS 1352224-88-4)
- 17-Keto Vecuronium Bromide (CAS 50587-93-4)
- Taurochenodeoxycholic Acid (CAS 516-35-8)
- 1,3-Dimethyl 5-[3-(2-chloroacetyl)-2,5-dimethyl-1h-pyrrol-1-yl]benzene-1,3-dicarboxylate (CAS 300676-07-7)
- 1-(2,3-Dihydro-1,4-benzodioxin-2-yl)-2-phenylethan-1-amine (CAS 1485392-13-9)
- 1,5-Dibromo-3-difluoromethoxy-2-(trifluoromethoxy)benzene (CAS 1803835-05-3)
- Semaglutide Impurity 161 (x TFA Salt) (CAS CATO-C4X-2226161)
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