4-Chloropyridine<I>N</I>-oxide CAS 1121-76-2
| CAS No. | 1121-76-2 |
| Molecular Formula | C5H4ClNO |
| Molecular Weight | 129.54 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 4-Chloropyridine<I>N</I>-oxide (C5H4ClNO) is characterized by an amide group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
4-Chloropyridine<I>N</I>-oxide (CAS 1121-76-2) is a high-purity analytical reference standard with the molecular formula C5H4ClNO and a molecular weight of 129.54 g/mol.
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-Chloropyridine<I>N</I>-oxide 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 | C5H4ClNO |
| Molecular Weight | 129.54 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, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Chloropyridine Standards
- 2-Chloropyridine 1-Oxide (CAS 2402-95-1)
- 3-Chloropyridine N-oxide (CAS 1851-22-5)
- 6-Chloropyridine-2-carbonitrile (CAS 33252-29-8)
- 2-Chloropyridine 13C5 (CAS 1329835-57-5)
- 2-Chloropyridine-d4 (CAS 1001003-94-6)
- 3-Chloropyridine-d4 (CAS 1001003-95-7)
- 5-Chloropyridine-2-carbaldehyde (CAS 31181-89-2)
- 6-Chloropyridine-3-carboxaldehyde (CAS 23100-12-1)
Recommended Standards
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