4-(5-Methyl-1,2,4-oxadiazol-3-yl)phenol CAS 49787-02-2
| CAS No. | 49787-02-2 |
| Molecular Formula | C9H8N2O2 |
| Molecular Weight | 176.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-(5-Methyl-1,2,4-oxadiazol-3-yl)phenol (CAS 49787-02-2), molecular formula C9H8N2O2 and molecular weight 176.17 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H8N2O2, 4-(5-Methyl-1,2,4-oxadiazol-3-yl)phenol 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 176.17 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).
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 | C9H8N2O2 |
| Molecular Weight | 176.17 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, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
| Nitrogen Atoms | 2 |
Related Methyl Standards
- 3-(3-Methyl-1,2,4-oxadiazol-5-yl)phenol (CAS 1082766-16-2)
- (4-(1,3,4-Oxadiazol-2-yl)phenyl)methanol (CAS 1378699-97-8)
- 5-Benzyl-1,3,4-oxadiazol-2(3H)-one (CAS 1711-94-0)
- (3-Phenyl-1,2,4-oxadiazol-5-yl)methanol (CAS 5543-33-9)
- (5-Phenyl-1,2,4-oxadiazol-3-yl)methanol (CAS 73217-37-5)
- (5-Phenyl-1,3,4-oxadiazol-2-yl)methanol (CAS 54014-02-7)
- 2-(3-Methyl-1,2,4-oxadiazol-5-yl)phenol (CAS 79349-23-8)
- 2-(5-Methyl-1,2,4-oxadiazol-3-yl)phenol (CAS 52561-90-7)
Recommended Standards
- 4-(5-Aminoisoxazol-3-yl)phenol (CAS 887591-61-9)
- 4-(5-Methyl-1,3,4-oxadiazol-2-yl)phenol (CAS 25877-46-7)
- 4-(4-Hydroxyphenyl)-1H-imidazol-2(3H)-one (CAS 944916-40-9)
- 4-(Hydroxyamino)quinoline N-Oxide (CAS 4637-56-3)
- N-(3-Cyano-4,5,6,7-tetrahydrobenzo[b]thiophen-2-yl)-1,5-dimethyl-1H-pyrazole-3-carboxamide (CAS 1052548-18-1)
- 3-(4-Chlorophenoxy)-5-nitroaniline (CAS 208122-61-6)
- 1-{[(Butan-2-yl)amino]methyl}naphthalen-2-ol (CAS 1019500-37-8)
- N-(3,3-Dimethyl-6-nitro-2-oxoindolin-5-yl)acetamide (CAS 100510-96-1)
- 2-(2-Fluoro-5-methyl-4-(trifluoromethyl)phenyl)acetic acid (CAS 1323966-46-6)
- 3-Bromo-5-methylphenol (CAS 74204-00-5)
- N,N-diethyl-2-methylbenzamide (CAS 2728-04-3)
- 2-((2,4-Dichlorophenyl)amino)thiazole-4-carboxylic acid (CAS 728918-54-5)
- 1,2:5,6-Di-O-isopropylidene-3-O-p-toluenesulfonyl-α-D-allofuranose (CAS 13964-21-1)
- Semaglutide impurity 267 (CAS CATO-C4X-2226267)
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