Introduction:
Octafluorocyclobutane (C-318), with the chemical formula C4F8, is a fluorinated cycloalkane with a range of industrial applications. Symb ChemTech offers high-quality C-318, catering to diverse needs in the food, electronics, and other specialized sectors. This article provides a comprehensive overview of C-318’s properties, applications, handling, and safety information.
Key Properties:

C-318 is a colorless, odorless, non-flammable gas at room temperature and pressure. Its key properties include:
- High Purity: Symb ChemTech provides C-318 in both Top Grade (99.99% purity) and First Grade (99.95% purity), ensuring consistent performance in sensitive applications.
- Low Impurity Levels: Stringent quality control limits water and oxygen content, minimizing potential issues in downstream processes.
- Specific Physical Properties:
- Molecular Formula: C4F8
- CAS No.: 115-25-3
- Boiling Point: -5.85°C
- Melting Point: -41.4°C
- Liquid Density (25°C): 1.62 g/cm³
Technical Specifications:
| Item | Top Grade | First Grade |
|---|---|---|
| C-318 (w/%) | ≥ 99.99 | ≥ 99.95 |
| Water (H₂O, w/%) | ≤ 0.001 | ≤ 0.002 |
| Oxygen (O2, %) | ≤ 0.002 | ≤ 0.002 |
Applications:
C-318’s unique properties make it suitable for various applications:
- Food Industry: Used as a propellant in food aerosols, providing consistent spraying performance.
- Refrigeration: Employed as a refrigerant in specialized applications, offering desirable thermodynamic properties.
- Electronics: Used as an etchant in integrated circuit manufacturing, facilitating precise material removal.
- Dielectric Gas: Blended with sulfur hexafluoride (SF<sub>6</sub>) to enhance dielectric properties in high-voltage equipment.
- Polymerization Aid: Used as a polymerization aid in the production of certain fluorinated compounds.
Handling and Safety Precautions:
- Asphyxiation Hazard: High concentrations of C-318 can displace oxygen in the air, leading to asphyxiation. Ensure adequate ventilation in areas where C-318 is used. If oxygen levels fall below 19.5%, it can cause suffocation.
- Frostbite Risk: Direct contact with liquid C-318 can cause frostbite. Wear appropriate protective equipment, such as insulated gloves and eye protection.
- Emergency Response: Rescue workers should use self-contained breathing apparatus (SCBA).
Packaging, Storage, and Transportation:
- Packaging: C-318 is typically packaged in cylinders at a filling ratio of 1.296 kg/L. Valves should be tightly closed, with stoppers and caps secured to prevent leakage.
- Storage: Store in a well-ventilated, dry area away from heat sources.
- Transportation: Handle cylinders with care to avoid shocks and impacts during transport.
Symb ChemTech’s Octafluorocyclobutane (C-318) is a versatile fluorocarbon with diverse applications across various industries. Its high purity and consistent quality make it a reliable choice for demanding applications.

