5-Chloroisoquinoline 2-oxide CAS 70810-25-2
| CAS No. | 70810-25-2 |
| Molecular Formula | C9H6ClNO |
| Molecular Weight | 179.60 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.
CATO supplies 5-Chloroisoquinoline 2-oxide (CAS 70810-25-2), a certified reference material (molecular formula C9H6ClNO, MW 179.60 g/mol) for analytical method development and quality control.
The molecular framework of 5-Chloroisoquinoline 2-oxide (C9H6ClNO) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 5-Chloroisoquinoline 2-oxide 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 | C9H6ClNO |
| Molecular Weight | 179.60 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Chloroisoquinoline Standards
- 8-Chloroisoquinoline 2-oxide (CAS 70810-27-4)
- 8-Methyl-6-chloroisoquinoline (CAS 196875-78-2)
- 1-Chloroisoquinoline-5-carbonitrile (CAS 1231761-23-1)
- 1-Chloroisoquinoline-8-carbonitrile (CAS 1231761-24-2)
- 5-Chloroisoquinoline-1-carbonitrile (CAS 1231761-25-3)
- 8-Chloroisoquinoline-1-carbonitrile (CAS 1231761-26-4)
- 4-Chloroisoquinoline-5-carbonitrile (CAS 1231761-27-5)
- 3-Chloroisoquinoline-1-carbonitrile (CAS 1237431-75-2)
Recommended Standards
- 5-Chloroisoquinolin-6-ol (CAS 918488-41-2)
- 5-Chloroquinolin-2(1H)-one (CAS 23981-22-8)
- 5-Chloroindole-3-carboxaldehyde (CAS 827-01-0)
- 5-Chloroquinolin-6-ol (CAS 64165-35-1)
- 2-(4-acetylbenzenesulfonyl)acetamide (CAS 1266854-36-7)
- N-(4-chlorobenzyl)-1,2-dihydronaphtho[2,1-b]furan-2-carboxamide (CAS 439111-14-5)
- [1-(2-chlorophenyl)-2-methylpropyl](methyl)amine hydrochloride (CAS 1306604-66-9)
- 1-(4H-Benzo[d][1,3]dioxin-6-yl)ethanone (CAS 57268-11-8)
- N'-[(1Z)-(2-Methylphenyl)methylidene]-2-(1H-pyrrol-1-yl)benzohydrazide (CAS 358984-41-5)
- N-(4-Chloro-3-methylphenyl)-5-methyl-12-oxo-5H,5aH,6H,7H,8H,9H,10H,12H-azepino[2,1-b]quinazoline-3-carboxamide (CAS 1775472-09-7)
- 3-[(CYclopropylmethyl)sulfanyl]phenol (CAS 1394926-84-1)
- Isopropyl 7-(difluoromethyl)-5-(p-tolyl)pyrazolo[1,5-a]pyrimidine-3-carboxylate (CAS 445230-67-1)
- (E)-1-Methoxy-4-(4-nitrostyryl)benzene (CAS 1472-68-0)
- Semaglutide impurity 26 (CAS CATO-C4X-222626)
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