5-(p-Tolyl)isoxazol-3-ol CAS 21053-25-8
| CAS No. | 21053-25-8 |
| Molecular Formula | C10H9NO2 |
| Molecular Weight | 175.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 175.18 g/mol gives 5-(p-Tolyl)isoxazol-3-ol distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 5-(p-Tolyl)isoxazol-3-ol (CAS 21053-25-8), a certified reference material (molecular formula C10H9NO2, MW 175.18 g/mol) for analytical method development and quality control.
Based on its molecular formula C10H9NO2, 5-(p-Tolyl)isoxazol-3-ol contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 175.18 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
As a certified reference material (CRM), 5-(p-Tolyl)isoxazol-3-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 | C10H9NO2 |
| Molecular Weight | 175.18 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 1 |
Related p Standards
- 2-(P-tolyl)oxazol-5(4H)-one (CAS 75152-18-0)
- 3-(p-Tolyl)isoxazol-5(4H)-one (CAS 25755-82-2)
- 5-(M-tolyl)-1,2,4-oxadiazol-3-amine (CAS 1017521-44-6)
- 5-(O-tolyl)-1,2,4-oxadiazol-3-amine (CAS 1017521-47-9)
- 5-(m-tolyl)-1,3,4-oxadiazol-2-amine (CAS 109060-64-2)
- 5-(O-tolyl)-1,3,4-oxadiazol-2-amine (CAS 1750-78-3)
- 3-(p-Tolyl)-1H-1,2,4-triazol-5(4H)-one (CAS 3214-02-6)
- 5-(P-tolyl)-1,2,4-oxadiazol-3-amine (CAS 23275-54-9)
Recommended Standards
- 5-(Hydroxymethyl)quinolin-6-ol (CAS 860716-17-2)
- 5,5-Difluoro-4,4-dimethyl-3-oxohexanenitrile (CAS 2737246-35-2)
- 5-(Hydroxymethyl)-8-hydroxyquinoline, 97% (CAS 4053-44-5)
- 5,5-difluoro-6,7-dihydro-1H-indol-4-one (CAS 2755402-17-4)
- 4-Bromo-3-(4-chlorophenyl)-2-fluoropropiophenone (CAS 898788-31-3)
- Methyl 4-(2,3-dichlorobenzoyl)-1-methyl-1H-pyrrole-2-carboxylate (CAS 338753-10-9)
- 2,5-Dioxopyrrolidin-1-yl 4-oxo-1,4-dihydro-1,5-naphthyridine-3-carboxylate (CAS 5442-69-3)
- PErfluoro-2,5-diazahexane-2,5-dioxyl (CAS 36525-64-1)
- 1-(Furan-2-yl)propan-1-one (CAS 3194-15-8)
- 6,7-Dihydro-5H-pyrrolo[2,1-c][1,2,4]triazole (CAS 116056-05-4)
- Ofloxacin EP Impurity D (CAS 197291-75-1)
- Ethyl 2-hydroxy-2-(oxetan-3-yl)acetate (CAS 1509910-39-7)
- 2,6,8-Trimethylnonan-4-ol (CAS 123-17-1)
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