4-Chloroisoquinoline CAS 1532-91-8
| CAS No. | 1532-91-8 |
| Molecular Formula | C9H6ClN |
| Molecular Weight | 163.60 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-Chloroisoquinoline (CAS 1532-91-8), molecular formula C9H6ClN and molecular weight 163.60 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H6ClN, 4-Chloroisoquinoline contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 163.60 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
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 | C9H6ClN |
| Molecular Weight | 163.60 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 |
| 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.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Chloroisoquinoline Standards
- 3-Chloroisoquinoline (CAS 19493-45-9)
- 5-Chloroisoquinoline (CAS 5430-45-5)
- 6-Chloroisoquinoline (CAS 62882-02-4)
- 7-Chloroisoquinoline (CAS 34784-06-0)
- 8-Chloroisoquinoline (CAS 34784-07-1)
- 1-Chloroisoquinoline (CAS 19493-44-8)
- 8-Methyl-6-chloroisoquinoline (CAS 196875-78-2)
- 5-Chloroisoquinoline 2-oxide (CAS 70810-25-2)
Recommended Standards
- 2-chloro-N-(2-oxopropyl)propanamide (CAS 1461708-06-4)
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- 2-chloro-N-(2-oxobutyl)acetamide (CAS 1461707-65-2)
- Ethyl 3-chloroazetidine-1-carboxylate (CAS 179894-04-3)
- 5-Fluoro-2-((tetrahydro-2H-pyran-4-yl)methoxy)aniline (CAS 1250626-67-5)
- 2-Chloro-4-iodopyridin-3-ol (CAS 1207973-15-6)
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- 8-Fluoro-2-methylimidazo[1,2-a]pyridin-6-amine (CAS 1643412-36-5)
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- 4-(1,3,4-Oxadiazol-2-yl)benzonitrile (CAS 595567-06-9)
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