3-Chloro-5-iodo-isoquinoline CAS 1695831-18-5
| CAS No. | 1695831-18-5 |
| Molecular Formula | C9H5ClIN |
| Molecular Weight | 289.50 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
3-Chloro-5-iodo-isoquinoline (CAS 1695831-18-5), molecular formula C9H5ClIN and molecular weight 289.50 g/mol, is a CATO reference standard with documented purity and traceability.
3-Chloro-5-iodo-isoquinoline (C9H5ClIN) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine/iodine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C9H5ClIN |
| Molecular Weight | 289.50 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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.) | 1994 |
| Halogen Content | Cl/I-containing |
| Nitrogen Atoms | 1 |
Related Chloro Standards
- 8-Chloro-6-iodoquinoline (CAS 111454-67-2)
- 1-Chloro-7-iodoisoquinoline (CAS 1170704-54-7)
- 7-Chloro-1-iodoisoquinoline (CAS 1203579-27-4)
- 6-chloro-4-iodopyridine-3-carboxylic acid (CAS 1211578-80-1)
- 2-Chloro-6-iodoquinoline (CAS 124467-20-5)
- 2-Chloro-3-iodoquinoline (CAS 128676-85-7)
- 2-Chloro-8-iodoquinoline (CAS 1339174-14-9)
- 1-Chloro-5-iodoisoquinoline (CAS 1379322-93-6)
Recommended Standards
- 4-Chloro-5-iodoquinoline (CAS 143946-46-7)
- 3-Chloro-7-iodoisoquinoline (CAS 1841079-91-1)
- 7-Chloro-3-iodoquinoline (CAS 1424245-91-9)
- 1-Chloro-8-iodo-isoquinoline (CAS 1965309-12-9)
- N-(2-Amino-5-bromopyridin-3-yl)methanesulfonamide (CAS 1257043-55-2)
- 4-(3-Fluorophenyl)-3-(methylsulfonyl)-1H-pyrazole (CAS 1710302-33-2)
- 3-Bromobenzylmagnesium bromide solution (CAS 107549-22-4)
- N-Benzyl-5-nitroimidazo[2,1-b][1,3]thiazol-6-amine (CAS 339008-14-9)
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- 1-((3,4-Diethoxyphenyl)sulfonyl)piperazine hydrochloride (CAS 1052545-83-1)
- Cinacalcet Impurity 39 (CAS CATO-C4X-105939)
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