3,5-Dimethylisoxazole-4-sulfinic acid CAS 787513-23-9
| CAS No. | 787513-23-9 |
| Molecular Formula | C5H7NO3S |
| Molecular Weight | 161.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3,5-Dimethylisoxazole-4-sulfinic acid.
CATO supplies 3,5-Dimethylisoxazole-4-sulfinic acid (CAS 787513-23-9), a certified reference material (molecular formula C5H7NO3S, MW 161.18 g/mol) for analytical method development and quality control.
Based on its molecular formula C5H7NO3S, 3,5-Dimethylisoxazole-4-sulfinic acid contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 161.18 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C5H7NO3S |
| Molecular Weight | 161.18 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1986 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Dimethylisoxazole Standards
- 3,5-Dimethylisoxazole-4-carbonyl chloride 3,5-dimethyl-1,2-oxazole-4-carbonyl chloride 3,5-dimethylisoxasole-4-carbonyl chloride 3,5-dimethylisoxazole-4-carbonylchloride 31301-45-8 (CAS 31301-45-8)
- Methyl 3,4-dimethylisoxazole-5-carboxylate (CAS 1355180-31-2)
- Methyl 4,5-dimethylisoxazole-3-carboxylate (CAS 160850-61-3)
- 3,5-Dimethylisoxazole-4-carbohydrazide (CAS 412313-52-1)
- Methyl 3,5-dimethylisoxazole-4-carboxylate (CAS 56328-87-1)
- N',5-Dimethylisoxazole-3-carbohydrazide (CAS 89465-06-5)
- Ethyl 4,5-dimethylisoxazole-3-carboxylate (CAS 160850-62-4)
- Ethyl 3,5-dimethylisoxazole-4-carboxylate (CAS 17147-42-1)
Recommended Standards
- 3-(4-Fluorophenyl)-2-methylacrylonitrile (CAS 198879-88-8)
- 3-Fluoro-4-methylquinoline (CAS 72473-78-0)
- 3-(2-Hydroxyethyl)-2-thioxooxazolidin-4-one (CAS 88850-29-7)
- 3-Fluoronaphthalen-2-amine (CAS 330803-45-7)
- 1-Amino-3-(3-bromophenyl)propan-2-ol (CAS 1225508-70-2)
- (3-Amino-3-carboxypropyl)dimethylsulfonium bromide (CAS 2766-51-0)
- 2-iodo-5,5-dimethylcyclohexane-1,3-dione (CAS 98593-03-4)
- 4-Oxotetrahydrofuran-2-carboxylic acid (CAS 2056072-58-1)
- 2-(oxolan-3-yl)acetonitrile (CAS 476415-60-8)
- N1-Ethyl-N1-((1-methylpiperidin-4-yl)methyl)ethane-1,2-diamine (CAS 1353951-95-7)
- tert-Butyl 2-methyl-1-oxa-3,8-diazaspiro[4.5]decane-8-carboxylate (CAS 2865130-10-3)
- 4-(5-Methyl-1H-imidazol-4-yl)piperidine dihydrochloride (CAS 147960-33-6)
- 4-Methyl-5-methylene-4-(4-methyl-3-penten-1-yl)-1,3-dioxolan-2-one (CAS 87761-95-3)
- Semaglutide Impurity 180 (CAS CATO-C4X-2226180)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com