4-Methylisoxazol-5-ol CAS 150991-99-4
| CAS No. | 150991-99-4 |
| Molecular Formula | C4H5NO2 |
| Molecular Weight | 99.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Methylisoxazol-5-ol (CAS 150991-99-4) is a high-purity analytical reference standard with the molecular formula C4H5NO2 and a molecular weight of 99.09 g/mol.
The molecular framework of 4-Methylisoxazol-5-ol (C4H5NO2) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 4-Methylisoxazol-5-ol under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
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.) | 2000 |
| Nitrogen Atoms | 1 |
Related Methylisoxazol Standards
- 3-Methylisoxazol-5(4H)-one (CAS 1517-96-0)
- 2-Methylisoxazol-3(2H)-one (CAS 26347-18-2)
- 3-Methylisoxazol-4-ol (CAS 515144-79-3)
- 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
- 5-Amino-3H-pyrazol-3-ol (CAS 145092-03-1)
- 5-Amino-4,5-dihydro-3H-pyrazol-3-one (CAS 141735-80-0)
- 4-(Hydroxymethyl)oxazole (CAS 155742-48-6)
- Cyanoacetohydrazide (CAS 140-87-4)
- 4-Butoxyphenyl 4-hydroxybenzoate (CAS 70568-44-4)
- 3-(3-Bromo-5-methoxyphenyl)propanoic acid (CAS 881190-50-7)
- Potassium 2-(pyridin-2-yloxy)acetate (CAS 2138086-22-1)
- (4-Bromophenyl)(3-hydroxyazetidin-1-yl)methanone (CAS 1343582-06-8)
- 4,7-Dimethoxy-1h-indole-2-carboxylic acid (CAS 31271-83-7)
- 2-(Difluoromethyl)-3-(trifluoromethyl)pyridine-6-carboxaldehyde (CAS 1804716-64-0)
- 3-Aminofuro[3,4-b]pyridin-7(5H)-one (CAS 2581105-54-4)
- Benzo[c][1,2,5]oxadiazol-4-ylmethanamine (CAS 1314952-30-1)
- 1,3-Benzothiazole-2-carbonyl chloride 67748-61-2 benzo[d]thiazole-2-carbonyl chloride (CAS 67748-61-2)
- Tau Peptide (298-312) trifluoroacetate salt (CAS 330456-47-8)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com