2-(((3-Oxo-2,3-dihydroisoxazol-5-yl)methyl)thio)benzoic acid CAS 89660-89-9
| CAS No. | 89660-89-9 |
| Molecular Formula | C11H9NO4S |
| Molecular Weight | 251.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
2-(((3-Oxo-2,3-dihydroisoxazol-5-yl)methyl)thio)benzoic acid (CAS 89660-89-9) is a high-purity analytical reference standard with the molecular formula C11H9NO4S and a molecular weight of 251.26 g/mol.
Based on its molecular formula C11H9NO4S, 2-(((3-Oxo-2,3-dihydroisoxazol-5-yl)methyl)thio)benzoic acid contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 251.26 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C11H9NO4S |
| Molecular Weight | 251.26 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Oxo Standards
- 5-Phenyl-4,5-dihydroisoxazol-3-yl dimethylcarbamate (CAS 62243-13-4)
- 3-(3-Phenyl-4,5-dihydroisoxazol-5-yl)propanoic acid (CAS 855601-66-0)
- 2-(3-Phenyl-4,5-dihydroisoxazol-5-yl)acetic Acid (CAS 6501-72-0)
- 1-(3-Phenyl-4,5-dihydroisoxazol-5-yl)propan-1-one (CAS 14659-66-6)
- 7-((3-Phenyl-4,5-dihydroisoxazol-5-yl)methyl)quinolin-8-ol (CAS 685523-27-7)
- 1-(4,5-Dihydroisoxazol-3-yl)-2-phenylethan-1-amine (CAS 1258640-70-8)
- 1-(3-Phenyl-4,5-dihydroisoxazol-5-yl)ethanone (CAS 54606-00-7)
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Recommended Standards
- 1-Tosyl-1H-pyrrole-2,5-dione (CAS 32368-50-6)
- 2-((1H-Pyrrol-1-yl)sulfonyl)benzoic acid (CAS 827024-12-4)
- 1-Methyl-4-(thiophene-2-carboxamido)-1H-imidazole-2-carboxylic acid (CAS 886496-76-0)
- 2-((2,5-Dioxopyrrolidin-3-yl)thio)benzoic acid (CAS 459421-21-7)
- 2-(4-(Difluoromethyl)-5-fluoro-3-hydroxypyridin-2-yl)acetic acid (CAS 1805582-26-6)
- [4-(5-Formyl-2-thienyl)phenyl]acetonitrile (CAS 893741-05-4)
- Ethyl 3-amino-4-methylthiophene-2-carboxylate (CAS 190375-17-8)
- 2-Cyclopropoxy-3-isopropyl-N,N-dimethylaniline (CAS 1243396-01-1)
- ((S)-1-Carboxy-2-(1-(3,5-dichlorobenzyl)-1H-imidazol-5-yl)ethyl)-L-leucine (CAS 305335-31-3)
- 4-Amino-1-cyclopropylpiperidine (CAS 62813-02-9)
- 4-Hydroxy-7-methylquinolin-2(4aH)-one (CAS 897312-22-0)
- 2-(2-Chloropyrimidin-4-yl)-2,3-dihydro-1h-isoindole (CAS 488817-09-0)
- Benzyl (piperidin-2-ylmethyl)carbamate (CAS 184044-09-5)
- D-Ser12-Semaglutide (CAS CATO-C4X-2226240)
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