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Parylene

Parylene's Resistance to Chemicals

(Acids, Alkalis and Solvents)

Swelling (Thickness change, %) on immersion in various chemicals for 10-16μm thickness film. (Typical values only)

Chemicals Immersing Condition Parylene C Parylene N Typical Values
Epoxies Urethanes
Hydrochloric acid 10% 75 / 120min A -0.28 A +0.08 B~C C~D
Sulfuric acid 10% 75 / 120 min A -0.28 A +0.07 A~B C~D
Nitric acid 10% 75 / 120min A -0.28 A +0.15 D D
Hydrofluoric acid 10% 50 / 120min A +0.09 A +0.37 B D
NaOH solution 10% 75 / 120min A -0.28 A +0.15 A~B B~C
NH4OH solution 10% 75 / 120min A -0.38 A +0.15 A B~C
Hydrogen peroxide water (H2O2) 50 / 120min A 0.00 A 0.00 C~D C~D
n-Octane 75 / 120min A +0.28 A +0.29 C B
Toluene 75 / 120min A +1.32 A +0.30 C C
Monochlorobenzene 75 / 120min A +1.04 A +0.37 D
Pyridine 75 / 120min A +0.28 A +0.29 D C
2-Propanol (IPA) 50 / 120min A 0.00 A +0.07 C B
Acetone 50 / 120min A -0.09 A +0.15 C~D C

A- Excellent Resistance B- Good Resistance C- Possible to Use with Difficult D- No Good to Use
[Typical Values of Epoxies and Urethanes are not tested by the same condition, but reference only]

Technical Data Sheet: PCT Parylene Chemical Resistance

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Para-Coat Technologies
17 Johns Street
Johnstown, PA 15901
Phone: (814) 254-4376
Fax: (814) 254-4057