3-(2,3-Dimethylphenyl)-5-methylisoxazole-4-carboxylic acid CAS 1479706-08-5
| CAS No. | 1479706-08-5 |
| Molecular Formula | C13H13NO3 |
| Molecular Weight | 231.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-(2,3-Dimethylphenyl)-5-methylisoxazole-4-carboxylic acid (CAS 1479706-08-5) is a high-purity analytical reference standard with the molecular formula C13H13NO3 and a molecular weight of 231.25 g/mol.
3-(2,3-Dimethylphenyl)-5-methylisoxazole-4-carboxylic acid (C13H13NO3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, 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-(2,3-Dimethylphenyl)-5-methylisoxazole-4-carboxylic acid 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 | C13H13NO3 |
| Molecular Weight | 231.25 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1992 |
| Nitrogen Atoms | 1 |
Related Dimethylphenyl Standards
- 3-(2,6-Dimethylphenyl)-5-methyl-1,2-oxazole-4-carboxylic acid (CAS 1104461-65-5)
- 3-(2,5-Dimethylphenyl)-5-methylisoxazole-4-carboxylic acid (CAS 1480355-55-2)
- 1-(3,4-Dimethylphenyl)-5-methyl-1H-1,2,3-triazole-4-carboxylic acid (CAS 923691-82-1)
- 1-(3,5-Dimethylphenyl)-5-methyl-1H-1,2,3-triazole-4-carboxylic acid (CAS 950259-04-8)
- 2-(2,4-dimethylphenyl)-5-methyl-2H-1,2,3-triazole-4-carboxylic acid (CAS 851175-96-7)
- 3-(3,5-Dimethylphenyl)-5-methylisoxazole-4-carboxylic acid (CAS 917388-40-0)
- 5-((3,4-Dimethylphenyl)amino)-6-hydroxypyrimidin-4(3H)-one (CAS 6972-23-2)
- Methyl 5-(2,4-dimethylphenyl)oxazole-4-carboxylate (CAS 89204-97-7)
Recommended Standards
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- 5-Ethyl-3-(p-tolyl)isoxazole-4-carboxylic acid (CAS 1482478-79-4)
- Ertapenem Impurity C28 (CAS 147266-92-0)
- 3-Amino-1-methylquinoxalin-2(1H)-one (CAS 90564-85-5)
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- 5-(4-Bromo-2-chlorophenyl)-1H-pyrazol-3-amine (CAS 934330-21-9)
- 6-Bromo-3-cyclopropyl-1H-indazole (CAS 1311197-90-6)
- 1-Ethynyl-5-azaspiro[2.5]Octane (CAS 2387597-69-3)
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- ([D2]Gly4)-Cholecystokinin Octapeptide (sulfated) ammonium salt (CAS 1926163-74-7)
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