5-Chloro-4-iodo-2-methylpyridine CAS 1245134-39-7
| CAS No. | 1245134-39-7 |
| Molecular Formula | C6H5ClIN |
| Molecular Weight | 253.47 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-Chloro-4-iodo-2-methylpyridine is closely related to a nitrile group, chlorine/iodine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
5-Chloro-4-iodo-2-methylpyridine (CAS 1245134-39-7), molecular formula C6H5ClIN and molecular weight 253.47 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 5-Chloro-4-iodo-2-methylpyridine (C6H5ClIN) contains a nitrile group, chlorine/iodine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 253.47 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C6H5ClIN |
| Molecular Weight | 253.47 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl/I-containing |
| Nitrogen Atoms | 1 |
Related Chloro Standards
- 4-Chloro-5-iodo-2-methylpyridine (CAS 1092287-21-2)
- 2-Chloro-6-iodo-3-methylpyridine (CAS 1133961-30-4)
- 3-Chloro-2-iodo-4-methylpyridine (CAS 1188435-39-3)
- 2-Chloro-3-iodo-6-methylpyridine (CAS 1214372-51-6)
- 3-Chloro-6-iodo-2-methylpyridine (CAS 1227514-48-8)
- 4-Chloro-3-iodo-2-methylpyridine (CAS 1227515-08-3)
- 3-Chloro-4-iodo-2-methylpyridine (CAS 1227578-12-2)
- 2-Chloro-4-iodo-6-methylpyridine (CAS 1227592-89-3)
Recommended Standards
- 2-Chloro-3-iodoaniline (CAS 1260803-50-6)
- 6-Chloro-2-iodo-3-methylpyridine (CAS 1261473-80-6)
- 3-chloro-5-iodo-4-methylpyridine (CAS 1261488-18-9)
- 4-Chloro-3-iodo-5-methylpyridine (CAS 1261562-62-2)
- diethyl 3-fluoro-3-(iodomethyl)cyclobutane-1,1-dicarboxylate (CAS 2471973-27-8)
- 1,3-Bis((1H-imidazol-1-yl)methyl)benzene (CAS 69506-92-9)
- 5-(2-Chlorophenyl)-6-hydroxy-3-methyl-1-phenylpyridazin-4(1H)-one (CAS 89314-20-5)
- rel-(1S,3s)-1,3-Dibromocyclobutane (CAS 4934-58-1)
- 3-Chloro-5-phenylisothiazole-4-carboxamide (CAS 457960-33-7)
- Teriflunomide Impurity 2 (CAS 69066-42-8)
- 4-(Isoxazol-3-yl)benzoic acid (CAS 1426232-07-6)
- 3-[(5-chloro-1,2,3-thiadiazol-4-yl)methyl]-5,5-dimethylimidazolidine-2,4-dione (CAS 1157111-08-4)
- (1-Isopropyl-1H-imidazol-5-yl)methanol hydrochloride (CAS 1609395-23-4)
- Semaglutide Impurity 190 (CAS CATO-C4X-2226190)
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