2-Chloropyridine 1-Oxide CAS 2402-95-1
| CAS No. | 2402-95-1 |
| Molecular Formula | C5H4ClNO |
| Molecular Weight | 129.54 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 2-Chloropyridine 1-Oxide (CAS 2402-95-1), a certified reference material (molecular formula C5H4ClNO, MW 129.54 g/mol) for analytical method development and quality control.
Based on its molecular formula C5H4ClNO, 2-Chloropyridine 1-Oxide contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 129.54 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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
- 4-Chloropyridine<I>N</I>-oxide (CAS 1121-76-2)
- 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
- 2-Chloro-5-hydroxypyridine (CAS 41288-96-4)
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- 1H-Pyrrole-2-carbonyl chloride (CAS 5427-82-7)
- 3-Chloropyrrole-2-carbaldehyde (CAS 56164-42-2)
- 2-Propenoic acid, 2-methyl-, octadecyl ester, polymer with N-(1,1-dimethyl-3-oxobutyl)-2-propenamide and 2-propenenitrile (CAS 67953-84-8)
- 2-Amino-1-(4-nitrophenyl)ethan-1-onehydrochloride (CAS 5425-81-0)
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- 8-Fluoro-4,4-dimethyl-1,2,3,4-tetrahydroquinoline (CAS 1187933-45-4)
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- Insulin Degludec impurity 4 (CAS CATO-C4X-21574)
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