3-Chloro-2,4,5,6-tetrafluoropyridine CAS 1735-84-8
| CAS No. | 1735-84-8 |
| Molecular Formula | C5ClF4N |
| Molecular Weight | 185.51 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 185.51 g/mol gives 3-Chloro-2,4,5,6-tetrafluoropyridine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
3-Chloro-2,4,5,6-tetrafluoropyridine (CAS 1735-84-8), molecular formula C5ClF4N and molecular weight 185.51 g/mol, is a CATO reference standard with documented purity and traceability.
3-Chloro-2,4,5,6-tetrafluoropyridine (C5ClF4N) contains a nitrile group, fluorine/chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
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 | C5ClF4N |
| Molecular Weight | 185.51 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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/Cl-containing |
| Nitrogen Atoms | 1 |
Related Chloro Standards
- 2-Chloro-3,4,5,6-tetrafluoropyridine (CAS 54774-81-1)
- 4-Chloro-2,3,5,6-tetrafluoropyridine (CAS 52026-98-9)
- 5-chloro-1-methyl-3-(trifluoromethyl)-1H-1,2,4-triazole (CAS 114108-83-7)
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Recommended Standards
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- N-(2,3-Dimethylphenyl)-2-((4-ethyl-5-(thiophen-2-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 557072-72-7)
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- 4-Chloro-1,1':2',1''-terphenyl (CAS 21711-54-6)
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