5-(Pyridin-2-yl)isoxazole-3-carbonyl chloride CAS 88958-32-1
| CAS No. | 88958-32-1 |
| Molecular Formula | C9H5ClN2O2 |
| Molecular Weight | 208.60 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-(Pyridin-2-yl)isoxazole-3-carbonyl chloride (C9H5ClN2O2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
5-(Pyridin-2-yl)isoxazole-3-carbonyl chloride (CAS 88958-32-1) is a high-purity analytical reference standard with the molecular formula C9H5ClN2O2 and a molecular weight of 208.60 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 5-(Pyridin-2-yl)isoxazole-3-carbonyl chloride 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 | C9H5ClN2O2 |
| Molecular Weight | 208.60 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, faint amine-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 DMSO, DMF, methanol |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
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- N-(pyridin-2-ylmethyl)tetrahydro-2H-thiopyran-4-amine (CAS 1153793-25-9)
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Recommended Standards
- 5-(Chloromethyl)-7-hydroxypyrazolo[1,5-a]pyrimidine-3-carbonitrile (CAS 925675-85-0)
- 5-Chloro-2-(1H-tetrazol-1-yl)benzaldehyde (CAS 879016-22-5)
- 5-(4-Chlorophenyl)-1,3,4-oxadiazole-2-carbaldehyde (CAS 944897-86-3)
- 5-chloro-3-nitro-pyridine-2-carboxylic acid (CAS 899423-94-0)
- 3-Chloro-6-ethoxypicolinimidamide hydrochloride (CAS 1179361-96-6)
- 2-(2-Chloro-6-fluorophenyl)-N-(4-(pyridin-4-yl)thiazol-2-yl)acetamide (CAS 692870-25-0)
- Ethyl 6-methyl-4-(4-methylphenyl)-2-oxo-1,2,3,4-tetrahydro-5-pyrimidinecarboxylate (CAS 299949-24-9)
- Isavuconazole Impurity 182 (CAS CATO-C4X-1236182)
- N4,Na,Na,Ne,Ne-[Pentakis(carboxymethyl)]-N (CAS 412334-17-9)
- Ceftopram lmpurity 42 (CAS CATO-C4X-135842)
- Tert-butyl 5-oxopentanoate (CAS 192123-41-4)
- Vonoprazan Impurity 213 (CAS CATO-C4X-1020213)
- (1-(tert-butoxycarbonyl)-5-nitro-1H-indol-2-yl)boronic acid (CAS 1000068-67-6)
- (D-His1)-Exenatide trifluoroacetate salt (CAS 1678417-09-8)
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