Fittings-Chromatography-2014 - page 100

general reference
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Resistanceat20°C PEEK PA PE PP PPS FEP ETFE PFA PTFE NBR EPDM
Acetaldehyde – – – – –
Aceticacid (20%)
Aceticacid (80%) – – –
Aceticacid (glacial)
Acetone
Acetonitrile – –
Acrylicacid – – – – – – –
Ammonia,anhydrous – – – – – –
Ammonia (10%) – –
Ammonia (Liquid) – – – – – –
Ammoniumhydroxide – – –
Aqua regia – – – –
Aromatichydrocarbons – – – – –
legend
Suitable
Nodataavailable
Not recommended
Marginal; dependent
onapplication
–
Chemical resistance PEEK and other polymers
A
Resistanceat20°C PEEK PA PE PP PPS FEP ETFE PFA PTFE NBR EPDM
Benzene – –
Benzoicacid – – – – – – –
Benzaldehyde – – – – – – –
Bromine/dibromoethane – – – – – – –
Bromine (dry) – – – – – – –
Bromine (wet) – – – –
Boricacid – – – – – – –
Butanol – – –
B
Chemical °C °F Rating
Aceticacid 200 420
Ammoniagas 200 420
Carbonmonoxidegas 200 420
Ethyleneglycol 200 420
Ethyleneglycol (50%) 140 284
Hydrogen sulphidegas 200 420
Liquidammonia 200 420
Chemical resistanceofPEEK
athigh temperature
Chemical resistanceofPEEKandotherpolymers
Methane 200 420
Methylethylketone 200 420
Nitrobenzene 200 420
Phosphoricacid (50%) 200 420
Sodiumhydroxide solution 200 420
Sulphuricacid (50%) 200 420
Sulphurdioxidegas 200 420
Chemical characteristicsofPEEK®
PEEKexhibitsexcellent resistance toawide rangeof
organicand inorganicchemicals. Thecompatibility
of PEEKwithmanychemicalsat 20°C (68°F) hasbeen
investigatedand the results forunreinforcedgradesare
given in the tablebelow.
PEEK is compatiblewithalmost anyof the solventsused
inHPLC. Theonly solventswhichwill attackPEEKare
concentratednitricacidand sulphuricacids. However,
PEEK tubingcan safelywithstand20-30%nitricacid
whenpassivatinga system.
Methylenechloride,DMSO,andTHFmaycause swelling
inPEEK. Thehighest temperaturewe recommend
forPEEK is100°C. The tubingwillmaintain the stated
pressure rating up to this temperature.