4,5-Dichloroquinoline CAS 21617-18-5
| CAS No. | 21617-18-5 |
| Molecular Formula | C9H5Cl2N |
| Molecular Weight | 198.05 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4,5-Dichloroquinoline.
4,5-Dichloroquinoline (CAS 21617-18-5), molecular formula C9H5Cl2N and molecular weight 198.05 g/mol, is a CATO reference standard with documented purity and traceability.
4,5-Dichloroquinoline (C9H5Cl2N) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine 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.
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), 4,5-Dichloroquinoline 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 | C9H5Cl2N |
| Molecular Weight | 198.05 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | >95% |
| 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.) | 1963 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Dichloroquinoline Standards
Recommended Standards
- 628-17-1 1-Iodopentane Pentane, 1-iodo- Amyl iodide n-Amyl iodide EINECS 211-030-0 1-Jodpentan [Czech] NSC 7901 Pentyl iodide n-Pentyl iodide 1-Pentyl iodide 1-Jodpentan (CAS 628-17-1)
- Hydroxychloroquine EP Impurity G (CAS 86-98-6)
- 2,5-Dichloro-3-pyridinecarboxylic Acid 2,5-Dichloronicotinic Acid 59782-85-3 D4240 (CAS 59782-85-3)
- 3-Bromo-5-cyclopropylpyridine (CAS 1044210-57-2)
- 1-Bromo-4-methoxy-2-methyl-5-nitrobenzene (CAS 89978-56-3)
- (E)-3-((2-hydroxybenzylidene)amino)benzonitrile (CAS 1133909-87-1)
- (4-(Azetidin-3-yl)-3-(trifluoromethyl)phenyl)boronic acid (CAS 2256708-85-5)
- 3-(5-(4-Fluorophenyl)oxazol-2-yl)aniline (CAS 1956306-30-1)
- 1-Chloropropylbenzene (CAS 934-11-2)
- 1,3-Difluoro-4-methoxy-2-(trifluoromethyl)benzene (CAS 1799420-90-8)
- [2-Amino-2-(4-bromo-phenyl)-ethyl]-carbamic acid tert-butyl ester (CAS 939760-50-6)
- Lauroyl-L-Aspartic Acid (Dodecanoyl-L-Aspartic Acid) (CAS 1116-13-8)
- 4-ethanesulfonamidobenzene-1-carboximidamide hydrochloride (CAS 1803583-35-8)
- Semaglutide impurity 31 (CAS CATO-C4X-222631)
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