4-Fluoropyridine CAS 694-52-0
| CAS No. | 694-52-0 |
| Molecular Formula | C5H4FN |
| Molecular Weight | 97.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 97.09 g/mol gives 4-Fluoropyridine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-Fluoropyridine (CAS 694-52-0), molecular formula C5H4FN and molecular weight 97.09 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 4-Fluoropyridine (C5H4FN) is characterized by a nitrile group, fluorine 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. 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.
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 | C5H4FN |
| Molecular Weight | 97.09 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 |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
Related Fluoropyridine Standards
- 3-Fluoropyridine (CAS 372-47-4)
- 2-Fluoropyridine (CAS 372-48-5)
- 4-Fluoropyridine N-oxide (CAS 124666-05-3)
- 3-Fluoropyridine 1-oxide (CAS 695-37-4)
- 4-Fluoropyridine-3-carbonitrile (CAS 1060802-53-0)
- 4-Fluoropyridine-2-carbonitrile (CAS 847225-56-3)
- 5-fluoropyridine-3-carbonitrile (CAS 696-42-4)
- 6-fluoropyridine-3-carbonitrile (CAS 3939-12-6)
Recommended Standards
- 1-Nitroso-1H-Imidazole (CAS 1233340-45-8)
- Furfural-α-d (CAS 42220-86-0)
- 5-Amino-3H-pyrazol-3-one (CAS 74586-24-6)
- 2H-1,2,3-Triazole-4-carbaldehyde (CAS 4343-71-9)
- 4-[2-Oxo-2-(1-piperidinyl)ethoxy]benzoic acid (CAS 29936-93-4)
- 4-(2-Chloroethyl)-1,3,2-dioxathiolane 2-oxide (CAS 1378464-10-8)
- Propyl 2-(4-{[5-(trifluoromethyl)pyridin-2-yl]oxy}phenoxy)propanoate (CAS 71689-82-2)
- 2-Chloro Loratadine (CAS 165739-64-0)
- 1-(4-Chlorophenyl)-3-(9-((2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-9H-purin-6-yl)urea (CAS 922713-75-5)
- 3-((4-Aminopiperidin-1-yl)sulfonyl)-1-methylpyridin-2(1H)-one (CAS 1710195-03-1)
- 2-Fluoro-N,N,N-trimethylethan-1-aminium chloride (CAS 57362-95-5)
- N-propylazetidin-3-amine (CAS 1496439-79-2)
- Halcinonide Impurity 8 (CAS CATO-C4X-27958)
- (Met(O)2?)-Glucagon (1-29) (human, rat, porcine) (CAS 75217-63-9)
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