Description
C4-FN / PFIBN (C4-fluoronitrile, C4FN) is a perfluorinated compound developed as a high-dielectric gas for high-voltage switchgear.It has the structure (CF3)2CFC≡N, which can be described as perfluoroisobutyronitrile, falling under the category of PFAS, or per- and polyfluoroalkyl substances.
Perfluoroisobutyronitrile (i-C₄F₇N) is a high‑performance, eco‑friendly fluorinated dielectric gas. It features outstanding insulation strength (~2× SF₆), low global warming potential (GWP ≈ 2210, ~1/10 of SF₆), zero ozone depletion potential (ODP), and excellent chemical stability.
It is widely used as a leading SF₆ alternative in high‑voltage power equipment, often blended with CO₂, O₂, or N₂. It also serves as a specialty fluorochemical intermediate and process gas in advanced manufacturing.
COA
| No. | Properties | Specifications | Testing results |
|---|---|---|---|
| 1 | Perfluoroisobutyronitrile (i-C₄F₇N) (wt, %) | ≥99.90 | 99.968 |
| 2 | Perfluorobutyronitrile (n-C₄F₇N) (wt, %) | ≤0.10 | ND |
| 3 | Trifluoroacetonitrile C₂F₃N (wt, %) | ≤0.002 | ND |
| 4 | Hexafluoropropylene C₃F₆ (wt, %) | ≤0.02 | ND |
| 5 | Heptafluoropropane C₃HF₇ (wt, %) | ≤0.05 | 0.031 |
| 6 | Oxygen (vol, %) | ≤0.02 | 0.0009 |
| 7 | Nitrogen (vol, %) | ≤0.08 | 0.0072 |
| 8 | Water (wt, %) | ≤0.001 | 0.0008 |
| 9 | Acidity, Calculated by HF (wt, %) | ≤0.0001 | 0.00007 |
Application
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Power & Electrical Equipment (Primary Use)
- Insulation and arc quenching in gas‑insulated switchgear (GIS), gas‑insulated lines (GIL), high‑voltage circuit breakers, and transformers.
- Used in mixtures (e.g., g³ gas: C₄F₇N + CO₂ + O₂) for medium‑ to ultra‑high‑voltage systems.
- Enables greener grid infrastructure with drastically lower greenhouse gas impact.
-
Semiconductor & Electronics Manufacturing
- Plasma etching and chamber cleaning for advanced wafer fabrication.
- Dielectric gas for high‑performance electronic components and sensors.
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Aerospace & Specialty Industries
- Dielectric insulation for high‑voltage systems in aircraft, satellites, and avionics.
- Intermediate for synthesizing high‑performance fluoropolymers, surfactants, and specialty coatings.
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Industrial & Specialty Chemicals
- High‑purity process gas for fluorochemical synthesis and material surface treatment.