3-Methylisoxazol-4-ol CAS 515144-79-3
| CAS No. | 515144-79-3 |
| Molecular Formula | C4H5NO2 |
| Molecular Weight | 99.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Methylisoxazol-4-ol (CAS 515144-79-3), molecular formula C4H5NO2 and molecular weight 99.09 g/mol, is a CATO reference standard with documented purity and traceability.
3-Methylisoxazol-4-ol (C4H5NO2) contains an amino-acid-derived structure, an amide 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.
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), 3-Methylisoxazol-4-ol 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 | C4H5NO2 |
| Molecular Weight | 99.09 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.) | 1984 |
| Nitrogen Atoms | 1 |
Related Methylisoxazol Standards
- 4-Methylisoxazol-5-ol (CAS 150991-99-4)
- 3-Methylisoxazol-5(4H)-one (CAS 1517-96-0)
- 2-Methylisoxazol-3(2H)-one (CAS 26347-18-2)
- 3-Methylisoxazol-5(2H)-one (CAS 29871-83-8)
- 3-Methylisoxazol-4-amine (CAS 354795-62-3)
- 5-Methylisoxazol-4-amine (CAS 87988-94-1)
- N-Methylisoxazol-3-amine (CAS 55809-39-7)
- 4-methylisoxazol-3-amine (CAS 1750-43-2)
Recommended Standards
- 3-Methyl-1,2-oxazol-5-ol (CAS 45469-93-0)
- 3-Methyl-1,2,4-oxadiazol-5-amine (CAS 3663-39-6)
- 4-Amino-1H-imidazol-1-ol (CAS 927416-67-9)
- 3-Hydroxy-1H-pyrrol-2(5H)-one (CAS 693826-68-5)
- 6-Cyano-4-hydroxyquinoline-3-carboxylic acid (CAS 228728-20-9)
- N-(5-Amino-3,6-dicyanopyrazin-2-yl)formamide (CAS 150307-31-6)
- 2-Butyl-1,3,2-dioxaborinane (CAS 30169-71-2)
- pyrazolo[1,5-a]pyridine-5-sulfonyl chloride (CAS 1610612-89-9)
- {2-[(4-bromophenyl)sulfanyl]pyridin-3-yl}methyl N-(3,5-dichlorophenyl)carbamate (CAS 478031-19-5)
- n-(4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)formamide (CAS 480424-94-0)
- N-(5-tert-butylisoxazol-3-yl)propanamide (CAS 74011-62-4)
- 4-(2-Chlorophenyl)-3-methylisoxazol-5-amine (CAS 924871-30-7)
- 4-[(4-Ethoxyphenoxy)methyl]piperidine (CAS 946725-38-8)
- Des-His(1)-Semaglutide (CAS CATO-C4X-2226216)
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