Chemours™ Krytox® 143 series oils are clear, colorless, fluorinated synthetic oils that are nonreactive, nonflammable, safe in chemical and oxygen service, and are long-lasting. Krytox® is a perfluoropolyether (PFPE)—also called perfluoroalkylether (PFAE) or perfluoropolyalkylether (PFPAE) The polymer chain is completely saturated and contains only carbon, oxygen, and fluorine. On a weight basis, a typical Krytox® oil contains 21.6% carbon, 9.4% oxygen, and 69.0% fluorine.
All standard grades of grease are thickened with high efficiency PTFE, whose formula is (CF2-CF2)n. This special high efficiency thickener has a melting point of 325°C (617°F) and has low molecular weight and submicron (0.2 μ) particle size for higher performance in bearings.
Krytox® 240 series greases are white buttery greases with all of the same properties as our 143 series oils that they are made from, but they are in grease form.
Krytox® 250 series EP greases are black greases that contain molybdenum disulfide added as an extreme pressure additive for highly loaded gears and bearings.
Krytox® 283 series anticorrosion greases are white greases that contain sodium nitrite. These grades provide rust protection at ambient temperatures, corrosion protection at high temperatures, and antiwear protection.
Chemours™ Krytox® 240 AC, 240 AB and 240 AZ gr-1 greases now have NSF approval for incidental food contact (H-1) in and around food processing areas.
Krytox Aerospace Oil is available in 6 standard grades
|Viscosity, cSt (20°C)
Vapor Pressure (Knudsen)
|4 x 10E-4
||1 x 10E-4
||4 x 10E-5
||5 x 10E-6
||8 x 10E-8
||6 x 10E-9|