3-Chloro-5-(chloromethyl)-2-methylpyridine CAS 1256789-72-6
| CAS No. | 1256789-72-6 |
| Molecular Formula | C7H7Cl2N |
| Molecular Weight | 176.04 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.
3-Chloro-5-(chloromethyl)-2-methylpyridine (CAS 1256789-72-6), molecular formula C7H7Cl2N and molecular weight 176.04 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C7H7Cl2N, 3-Chloro-5-(chloromethyl)-2-methylpyridine contains a nitrile group, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 176.04 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C7H7Cl2N |
| Molecular Weight | 176.04 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-containing |
| Nitrogen Atoms | 1 |
Related Chloro Standards
- 4-Chloro-2-(chloromethyl)aniline (CAS 114060-06-9)
- 2-Chloro-5-(2-chloroethyl)pyridine (CAS 117528-26-4)
- 4-Chloro-2-(chloromethyl)-5-methylpyridine (CAS 1196157-08-0)
- 6-Chloro-3-(chloromethyl)-2-methylpyridine (CAS 1211530-38-9)
- 2-Chloro-5-(chloromethyl)-4-methylpyridine (CAS 1211532-12-5)
- 2-Chloro-4-(chloromethyl)-3-methylpyridine (CAS 1211588-98-5)
- 3-chloro-4-(chloromethyl)-2-methylpyridine (CAS 1227499-11-7)
- 2-Chloro-3-(chloromethyl)-4-methylpyridine (CAS 1227576-87-5)
Recommended Standards
- 2,5-Dichloro-3,6-dimethylpyridine (CAS 125014-98-4)
- 3-Chloro-2-(chloromethyl)-6-methylpyridine (CAS 1256790-43-8)
- 2-Chloro-6-(chloromethyl)-4-methylpyridine (CAS 1227606-30-5)
- 3-Chloro-2-(chloromethyl)-5-methylpyridine (CAS 1256790-68-7)
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