3-(4-Chloro-phenyl)-isoxazole-5-carboxylic acid ethyl ester 81282-12-4 82C124 CAS 81282-12-4
| CAS No. | 81282-12-4 |
| Molecular Formula | C12H20ClNO3 |
| Molecular Weight | 261.75 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-(4-Chloro-phenyl)-isoxazole-5-carboxylic acid ethyl ester 81282-12-4 82C124 (CAS 81282-12-4), molecular formula C12H20ClNO3 and molecular weight 261.75 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, 3-(4-Chloro-phenyl)-isoxazole-5-carboxylic acid ethyl ester 81282-12-4 82C124 is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 261.75 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 3-(4-Chloro-phenyl)-isoxazole-5-carboxylic acid ethyl ester 81282-12-4 82C124 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C12H20ClNO3 |
| Molecular Weight | 261.75 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1980 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
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Recommended Standards
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- copper acetylacetonate (CAS 13395-16-9)
- tert-butyl 7-chloro-3H-imidazo[4,5-b]pyridine-3-carboxylate (CAS 878011-41-7)
- n-(2-Chlorobenzyl)-2-(ethylsulfonyl)ethan-1-amine (CAS 1157829-73-6)
- 1-(4-Hydroxyphenyl)-1,2-dihydro-5H-tetrazole-5-thione (CAS 52431-78-4)
- (R)-3-Amino-3-(3-pyridyl)-propionic acid (CAS 155050-17-2)
- (3-Chloro-4,5-dihydroxyphenyl)acetic acid (CAS 88516-94-3)
- 2,2-Dimethyl-3-(pyridin-2-yl)propanoic acid (CAS 162648-22-8)
- tert-Butyl ((1-(2-hydroxyethyl)pyrrolidin-2-yl)methyl)(methyl)carbamate (CAS 1353986-94-3)
- 4-(2-Ethoxybenzoyl)-1-oxa-4-azaspiro[4.5]decane-3-carboxylic acid (CAS 1326810-57-4)
- 1-Methyl-2,9-dihydro-3H-pyrido[3,4-b]indol-3-one (CAS 35296-52-7)
- 2-(5-Benzyl-4-methyl-6-oxopyrimidin-1(6H)-yl)acetic acid (CAS 1707571-67-2)
- Rufinamide Cyano Impurity (CAS 202003-06-3)
- Neuropeptide K, porcine (CAS 106441-70-7)
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