3-Isopropylisoxazole-5-carboxylic acid CAS 14633-22-8
| CAS No. | 14633-22-8 |
| Molecular Formula | C7H9NO3 |
| Molecular Weight | 155.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C7H9NO3, 3-Isopropylisoxazole-5-carboxylic acid 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 155.15 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
3-Isopropylisoxazole-5-carboxylic acid (CAS 14633-22-8), molecular formula C7H9NO3 and molecular weight 155.15 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C7H9NO3 |
| Molecular Weight | 155.15 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 methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1961 |
| Nitrogen Atoms | 1 |
Related Isopropylisoxazole Standards
- 4-Isopropylisoxazole-3-carboxylic acid (CAS 1260621-17-7)
- 3-Isopropylisoxazole-4-carboxylic acid (CAS 1368177-31-4)
- 5-Isopropylisoxazole-3-carboxamide (CAS 71433-23-3)
- 5-Isopropylisoxazole-3-carbonyl chloride (CAS 53064-56-5)
- 5-Ethyl-3-isopropylisoxazole-4-carboxylic acid (CAS 1048920-60-0)
- Ethyl 4-isopropylisoxazole-3-carboxylate (CAS 1332635-53-6)
- Ethyl 5-isopropylisoxazole-4-carboxylate (CAS 134540-96-8)
- Ethyl 3-isopropylisoxazole-5-carboxylate (CAS 2207-47-8)
Recommended Standards
- 2-Methyl-5-oxo-4,5-dihydro-1H-pyrrole-3-carbohydrazide (CAS 145888-70-6)
- 2-Hydroxy-3-(1H-pyrrol-1-yl)propanoic acid (CAS 1466519-24-3)
- Methyl 1-amino-5-methyl-1H-pyrazole-4-carboxylate (CAS 145631-09-0)
- 2-Amino-2-(1-methyl-1H-pyrazol-3-yl)acetic acid (CAS 1468012-69-2)
- 4-(Hydroxydiphenylmethyl)phenol (CAS 15658-11-4)
- 3ʹ-Adenosine phosphate 5ʹ-phosphate sulfate, tetralithium salt (CAS 102029-54-9)
- Triphenyl((tetrahydrofuran-2-yl)methyl)phosphonium bromide (CAS 18138-76-6)
- 2,4,6-Trimethylphenylzinc iodide (CAS 718628-26-3)
- 2-Bromo-N-(3-methoxypropyl)benzenesulfonamide (CAS 848906-56-9)
- 3,5-Dichloro-6-iodopyrazolo[1,5-a]pyrimidine (CAS 2640353-16-6)
- 2-(5-Methyl-2-(p-tolyl)oxazol-4-yl)ethanol (CAS 157169-71-6)
- Methyl 2-amino-5-benzyl-4-methylthiophene-3-carboxylate (CAS 304478-66-8)
- 1-Acetamido-8-naphthol-3,6-disulfonic acid, 97% (CAS 134-34-9)
- Liraglutide-d8 Tetratrifluoroacetate (CAS 204656-20-2 (non-labelled, free base))
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