5-(3-Chlorobenzo[b]thiophen-2-yl)-3-methyl-4-nitroisoxazole CAS 143806-62-6
| CAS No. | 143806-62-6 |
| Molecular Formula | C12H7ClN2O3S |
| Molecular Weight | 294.71 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5-(3-Chlorobenzo[b]thiophen-2-yl)-3-methyl-4-nitroisoxazole 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.
5-(3-Chlorobenzo[b]thiophen-2-yl)-3-methyl-4-nitroisoxazole (CAS 143806-62-6) is a high-purity analytical reference standard with the molecular formula C12H7ClN2O3S and a molecular weight of 294.71 g/mol.
Based on its molecular formula C12H7ClN2O3S, 5-(3-Chlorobenzo[b]thiophen-2-yl)-3-methyl-4-nitroisoxazole contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 294.71 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C12H7ClN2O3S |
| Molecular Weight | 294.71 g/mol |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1998 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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Recommended Standards
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- 2-Chloro-4-((4-fluorobenzyl)oxy)-5-methoxybenzaldehyde (CAS 1427014-00-3)
- 3-Chloro-4-((2-fluorobenzyl)oxy)benzohydrazide (CAS 1706429-06-2)
- 2-(4-Bromophenoxy)-N-(1h-pyrazol-4-yl)acetamide (CAS 1153237-51-4)
- Methyl 2-amino-4,6-dimethylbenzoate (CAS 35490-78-9)
- 4-(1-Hydroxy-2-naphthamido)-3-nitrobenzene-1-sulfonyl fluoride (CAS 1868-64-0)
- Dibutyltin distearate (CAS 5847-55-2)
- (5,6-Difluoropyridin-2-yl)methanol (CAS 1227601-43-5)
- 3-Iodo-1-(propan-2-yl)-1H-pyrazole-4-carbaldehyde (CAS 1946813-73-5)
- 2-(Aminomethyl)-6-cyano-5-(difluoromethyl)-3-methoxypyridine (CAS 1805286-63-8)
- (Z)-1,4-dibromo-1,1,2-trifluorobut-2-ene (CAS 137906-27-5)
- 2-(Chloromethyl)-4-(difluoromethyl)-3-methylpyridine-6-acetonitrile (CAS 1361800-32-9)
- Neuropeptide K, porcine (CAS 106441-70-7)
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