Dionex UltiMate 3000 Series, Operating Instructions Manual

Page: 221 / 236

UltiMate 3000 Series:
SD, RS, and BM Pumps
Operating Instructions Page 207
12 Reference Information
12.1 Chemical Resistance of PEEK
While PEEK has superb chemical resistance to most organic solvents, it tends to swell
when in contact with trichlormethane (CHCl3), dimethyl sulfoxide (DMSO), or
tetrahydrofuran (THF). In addition, it is attacked by concentrated acids, such as, sulfuric
acid and nitric acid or a mixture of hexane, ethyl acetate, and methanol. Swelling or attack
by concentrated acids is not a problem with brief flushing procedures.
For information about the chemical resistance of PEEK, see the table.
Medium Concentration
[%] Temperature Maximum
Duration
(Days) Resistance
(+ = yes; - = no)
Acetaldehyde techn. pure 23 +
Acetic acid 96 23 7 +
Acetone 100 23 7 +
Ammonia
28 23 7 +
Ammonium sulphate 23 +
Amyl acetate 100 23 +
Amyl alcohol techn. pure 23 +
Benzaldehyde 23 7 +
Benzene 100 23 7 +
Benzene/Benzene mixture 60 42 +
Benzoic acid
23 +
Borax
60 +
Bromine 23 -
Butane 23 +
Butanol 100 23 +
Calcium hydroxide 23 +
Carbon dioxide 100 23 +
Carbon tetrachloride 100 23 +
Chloric gas
23 +
Chlorine (liquid) 23 -
Chlorobenzene 100 23 +
Chloroform (trichlormethane) 100 23 +
Chromic acid 40 23 +
Citric acid 23 +
Copper sulphate 23 +
Cyclohexane 100 23 +
Cyclohexanol
100 23 +
Cyclohexanone 23 +
Diethyl ether 100 23 7 +