XHT

Performance Lubricants
Extreme High Temperature Oils

Product Information
Krytox™ XHT series oils are special extreme hightemperature grade oils with low evaporation and extra
treatment to allow use at temperatures above the range
of normal perfluoropolyether (PFPE) oils. These oils
provide excellent lubrication over a broad temperature
range. Krytox™ XHT series oils are nonflammable andchemically inert.
Krytox™ XHT oils allow extended lubrication intervals
and longer equipment life. The oil can begin to slowly
evaporate at temperatures above 330 °C (626 °F), andthis will occur at an increasing rate as temperaturesincrease. Re-lubrication could be required at thesetemperatures to achieve optimum life.
Krytox™ PFPE Oils
Krytox™ PFPE oils are clear, colorless, fluorinatedsynthetic oils that are nonreactive, nonflammable, safein chemical and oxygen service, and long lasting. Krytox™
is a PFPE—also called perfluoroalkylether (PFAE) or
perfluoro­polyalkylether (PFPAE)—with the following
chemical structure:
F-(CF-CF2-O)n-CF2CF3|				where n=10 to 60
CF3			Compatibility with Metals
Due to their low surface tensions, Krytox™ oils easily
wet metallic surfaces, and, because of their inertness,
Krytox™ oils have little or no adverse effect on metals.
Testing of metals at 340 °C (644 °F) in the absence of
air has shown little evidence of corrosion. In the presenceof air, corrosion was slightly higher. The presence ofmolybdenum in the metals improved corrosion resistance.

Performance Lubricants

Krytox™

Typical Properties of Krytox™ XHT PFPE Oil*
XHT-500 (H-1)

XHT-750

XHT-1000–20/300 (–4/572)–15/350 (5/662)–5/360 (23/680)

Base Oil Viscosity, cSt
20 °C (68 °F)
40 °C (104 °F)
100 °C (212 °F)

1,712
500
46.4

2,610
738
64.6

3,500
1,023
88.5

Oil Viscosity Index

148

157

171

Oil Pour Point, °C (°F)

–25 (–13)–15 (5)–5 (23)

Oil Density, g/mL
0 °C (32 °F)
100 °C (212 °F)

1.95
1.78

1.95
1.78

1.95
1.78

Oil Volatility, % in 22 hr
204 °C (400 °F)
260 °C (500 °F)<10.8—
0.6—
0.5

Vapor Pressure
20 °C (68 °F) (Knudsen)
100 °C (212 °F) (Knudsen)200 °C (392 °F) (Knudsen)≤1 x 10–9≤8 x 10–7≤1 x 10–4≤3 x 10–14≤1 x 10–9≤2 x 10–6≤4 x 10–15≤2 x 10–10≤3 x 10–7

Food Contact Approval

NSF H-1

None

None

Estimated Useful Range, °C (°F)

* This table gives typical properties (not specifications) based on historical production performance. Chemours does not make any express or implied warranty that these products willcontinue to have these typical properties.

The information set forth herein is furnished free of charge and based on technical data that Chemours believes to be reliable. It is intended for use by persons having technical skill, at their own
discretion and risk. The handling precaution information contained herein is given with the understanding that those using it will satisfy themselves that their particular conditions of use present
no health or safety hazards. Because conditions of product use are outside our control, Chemours makes no warranties, express or implied, and assumes no liability in connection with any useof this information. As with any material, evaluation of any compound under end-use conditions prior to specification is essential. Nothing herein is to be taken as a license to operate under or arecommendation to infringe any patents.
NO PART OF THIS MATERIAL MAY BE REPRODUCED, STORED IN A RETRIEVAL SYSTEM OR TRANSMITTED IN ANY FORM OR BY ANY MEANS ELECTRONIC, MECHANICAL, PHOTOCOPYING, RECORDING OR OTHERWISEWITHOUT THE PRIOR WRITTEN PERMISSION OF CHEMOURS.

For product information, industry applications, technical assistance, or global distributor contacts, visit krytox.com or within the U.S. and Canada, call 1-844-773-CHEM/2436 oroutside of the U.S., call 1-302-773-1000.
© 2016 The Chemours Company FC, LLC. Krytox™ and any associated logos are trademarks or copyrights of The Chemours Company FC, LLC. Chemours™ and the Chemours Logo aretrademarks of The Chemours Company.
Replaces: K-02034-5
C-10879 (6/16)