3-Ethynyl-2,4-difluoropyridine CAS 1426244-29-2
| CAS No. | 1426244-29-2 |
| Molecular Formula | C7H3F2N |
| Molecular Weight | 139.10 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.
3-Ethynyl-2,4-difluoropyridine (CAS 1426244-29-2) is a high-purity analytical reference standard with the molecular formula C7H3F2N and a molecular weight of 139.10 g/mol.
Owing to a nitrile group, fluorine substitution, an aromatic ring system, 3-Ethynyl-2,4-difluoropyridine is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 139.10 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C7H3F2N |
| Molecular Weight | 139.10 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
Related Ethynyl Standards
- 2-Ethynyl-3,5-difluoropyridine (CAS 1121585-18-9)
- 4-Ethynyl-2,5-difluoropyridine (CAS 1426243-94-8)
- 4-Ethynyl-2,3-difluoropyridine (CAS 1426244-30-5)
- 5-Ethynyl-2,3-difluoropyridine (CAS 1824109-24-1)
- 4-Ethynyl-3,5-difluoropyridine (CAS 1824403-41-9)
- 3-ethynyl-3-hydroxy-1-methylpyrrolidin-2-one (CAS 1202769-93-4)
- (R)-3-Ethynyl-3-hydroxy-1-methylpyrrolidin-2-one, >97% (CAS 1451089-77-2)
- (S)-3-Ethynyl-3-hydroxy-1-methylpyrrolidin-2-one (CAS 1799615-79-4)
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