4,5-Dihydroisoxazole-3-carboxylic Acid CAS 4485-98-7
| CAS No. | 4485-98-7 |
| Molecular Formula | C4H5NO3 |
| Molecular Weight | 115.09 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-Dihydroisoxazole-3-carboxylic Acid (CAS 4485-98-7), molecular formula C4H5NO3 and molecular weight 115.09 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4,5-Dihydroisoxazole-3-carboxylic Acid (C4H5NO3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 115.09 g/mol, it falls into the low-molecular-weight range. 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 | C4H5NO3 |
| Molecular Weight | 115.09 g/mol |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
Related Dihydroisoxazole Standards
- 3-Methyl-4,5-dihydroisoxazole-5-carbonitrile (CAS 86260-83-5)
- 3-Oxo-2,3-dihydroisoxazole-4-carboxylic acid (CAS 178316-78-4)
- 2-Methyl-2,3-dihydroisoxazole-4-carboxylic acid (CAS 1260758-16-4)
- Methyl 4,5-dihydroisoxazole-3-carboxylate (CAS 50491-29-7)
- 3-Propyl-4,5-dihydroisoxazole-5-carbonitrile (CAS 190907-50-7)
- Ethyl 4,5-dihydroisoxazole-5-carboxylate (CAS 114120-87-5)
- 5-Methyl-4,5-dihydroisoxazole-3-carbohydrazide (CAS 89417-90-3)
- 3-Phenyl-4,5-dihydroisoxazole (CAS 14397-33-2)
Recommended Standards
- 3-Aminodihydrofuran-2,5-dione (CAS 4432-62-6)
- 4-Amino-4-oxobut-2-enoic acid (CAS 4452-01-1)
- 3-(Nitromethylene)oxetane (CAS 922500-95-6)
- 4-Methyloxazolidine-2,5-dione (CAS 30291-41-9)
- 5-Bromo-N-(2-(cyclohex-1-en-1-yl)ethyl)-2-methoxy-4-methylbenzenesulfonamide (CAS 898644-70-7)
- Fenoldopam 8-Sulfate (CAS 87549-39-1)
- 2-(4-Bromobenzoyl)-1H-indole-3-carboxylic acid (CAS 75822-51-4)
- 4-Amino-N-(4-ethoxyphenyl)benzenesulfonamide hydrochloride (CAS 1047620-35-8)
- Ethyl 2-([1,1'-biphenyl]-3-yl)acetate (CAS 71912-70-4)
- N-tert-Butyloxycarbonyl-D-erythro-dihydro-D-sphingosine (CAS 140408-14-6)
- N-(4-aminophenyl)-2-chloro-4,5-difluorobenzamide (CAS 1087448-65-4)
- (3-Amino-1-methyl-1H-pyrazol-5-yl)(4-methyl-1H-pyrazol-1-yl)methanone (CAS 1856100-11-2)
- N1-Cyclopentyl-N2-(2-(dimethylamino)-2-(thiophen-2-yl)ethyl)oxalamide (CAS 941870-65-1)
- Tirzepatide Impurity 59 (CAS CATO-C4X-324059)
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