Replacement for 3M™ Fluorinert™ FC-40
| Part # | Name | Size | Ordering |
|---|---|---|---|
| 25004055 | BestSolv® 40-55 | 55 gal. drum | |
| 25004004 | BestSolv® 40-03 | 3.25 gal. pail | |
| 25004001 | BestSolv® 40-01 | 0.75 gallon container |
Product Description
BestSolv® 40 is a high-performance inert dielectric perfluorocarbon (PFC) heat transfer fluid designed for reliable thermal management in sensitive electronic and industrial applications. Developed as a replacement for 3M™ Fluorinert™ FC-40, BestSolv® 40 offers similar performance for cooling systems where stability, safety, and electrical insulation are critical.
With a wide liquid range (boiling point of 165°C and pour point of -66°C), low viscosity, and excellent dielectric properties, BestSolv® 40 efficiently transfers heat while maintaining safe operation across varying thermal loads. The fluid is chemically stable, nonflammable, noncorrosive, and exhibits no flash or auto-ignition point—making it ideal for mission-critical cooling in semiconductor fabrication, power electronics, and test systems.
BestSolv® 40 is a similar molecule replacement for 3M™ Fluorinert™ FC 40.
Recommended Applications
- Semiconductor manufacturing
- Supercomputing
- Aviation and military electronics
- Pharmaceutical manufacturing
Features and Benefits
- Similar molecule replacement for 3M™ Fluorinert™ FC-40 Electronic Liquid
- Also known as:
- Perfluoro compounds, C5-18
- CAS 86508-42-1
- Non-flammable
- Electrically non-conductive
- Wide operating temperature range
- Chemical and thermal stability
- Compatible with most metals, plastics and elastomers
- Low toxicity profile
- Residue free and colorless
Composition & Properties
| Type | PFC |
| CAS # | 86508-42-1 |
| 3M™ Fluorinert™ Replacement Type | Similar Molecule |
| Boiling Point | 165 °C °F / 74 °C |
| Pour Point | -66 °C / -54 °C |
| Density | 1.803 g/cm3 |
| Kinematic Viscosity | 3.05 cSt |
| Vapor Pressure | 3.756 torr |
| Specific Heat | 0.36 cal/g∙°C |
| Heat of Vaporization @ Boiling Point | 29 cal/g |
| Refractive Index | 1.308 |
| Coefficient of Thermal Expansion | 0.0013 ∙°C |
| Surface Tension | 16.98 dyne/cm |
| Thermal Conductivity | 0.067 W/m-K |
| Dielectric Strength | 40 kV |
| Dielectric Constant | 3.82 |
| Volume Resistance | 1∙10¹⁵ Ohm∙cm |
| Average Molecular Weight | 530 amu |
| Dissipation factor (1 Khz) | 1∙10⁻³ |
| Solubility of water | 7 ppm (wt) |
| Solubility of air | 26 cm³ gas |
| Flash Point | None |
Related Products
BestSolv® is distributed exclusively by Best Technology Inc.