3-Chloroisoxazole CAS 73028-29-2
| CAS No. | 73028-29-2 |
| Molecular Formula | C3H2ClNO |
| Molecular Weight | 103.51 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 3-Chloroisoxazole is closely related to an amide group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
3-Chloroisoxazole (CAS 73028-29-2), molecular formula C3H2ClNO and molecular weight 103.51 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C3H2ClNO, 3-Chloroisoxazole contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 103.51 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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 | C3H2ClNO |
| Molecular Weight | 103.51 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1977 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Chloroisoxazole Standards
- 5-Chloroisoxazole (CAS 1146207-55-7)
- 3-Chloroisoxazole-5-carboxylic acid (CAS 20724-56-5)
- 5-Chloroisoxazole-3-carboxylic acid (CAS 343566-57-4)
- Methyl 3-chloroisoxazole-5-carboxylate (CAS 96735-12-5)
- Methyl 5-chloroisoxazole-3-carboxylate (CAS 2111492-14-7)
- 3-Chloroisoxazole-5-carbonyl chloride (CAS 104164-45-6)
Recommended Standards
- 3-Chloro-4H-1,2,4-triazole (CAS 64304-35-4)
- 4-Chloro-1H-1,2,3-triazole (CAS 40964-55-4)
- 3-Chloro-1,2,4-triazole (CAS 6818-99-1)
- N-Cyano-1-chloroformamidine (CAS 25816-30-2)
- 5'-Bromo-3,6-dimethyl-4H-[1,4'-bipyridazin]-6'(1'H)-one (CAS 6953-93-1)
- 2-Hydroxypropanoicacidcalciumsalt,trihydrate (CAS 139061-06-6)
- (4-((1,4-Dioxa-8-azaspiro[4.5]Decan-8-yl)methyl)phenyl)(2-(trifluoromethyl)phenyl)methanone (CAS 898758-10-6)
- 2,3,4,5-Tetrahydro-1h-2-benzazepin-5-ol (CAS 933710-17-9)
- 3,5-Dimethyl-1-[(3-phenoxyphenyl)methyl]-1h-pyrazol-4-amine (CAS 514800-85-2)
- N-(2-((2-hydroxyethyl)amino)ethyl)furan-2-carboxamide (CAS 797027-56-6)
- 3-Iodo-2,5,6-trimethoxypyridine (CAS 1364917-19-0)
- 2-Amino-3-methoxypropan-1-ol (CAS 716314-11-3)
- N-(2-(Indolin-1-yl)phenyl)benzamide (CAS 71971-54-5)
- Semaglutide impurity 70 (CAS CATO-C4X-222670)
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