3-Chloro-5-methylpyridine CAS 19230-55-8
| CAS No. | 19230-55-8 |
| Molecular Formula | C6H6ClN |
| Molecular Weight | 127.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 3-Chloro-5-methylpyridine is closely related to a nitrile group, chlorine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
3-Chloro-5-methylpyridine (CAS 19230-55-8) is a high-purity analytical reference standard with the molecular formula C6H6ClN and a molecular weight of 127.57 g/mol.
Structurally, 3-Chloro-5-methylpyridine (C6H6ClN) contains a nitrile group, chlorine 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 127.57 g/mol, it falls into the low-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 | C6H6ClN |
| Molecular Weight | 127.57 g/mol |
| 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.) | 1962 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Chloro Standards
- 4-Chloro-3-methylpyridine (CAS 1681-36-3)
- 2-Chloro-3-methylpyridine (CAS 18368-76-8)
- 3-Chloro-2-methylpyridine (CAS 72093-03-9)
- 3-Chloro-4-methylpyridine (CAS 72093-04-0)
- 5-Chloro-2-methylpyridine (CAS 72093-07-3)
- 2-Chloro-5-methylpyridine (CAS 18368-64-4)
- 4-Chloro-2-picoline (CAS 3678-63-5)
- 4-Chloro-1H-imidazole-5-carbonitrile (CAS 1333380-68-9)
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