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Perhaps the Most complete Chemicals compatibility table http://www.coleparmer.com/techinfo/ChemComp.asp
 
The table below, demonstrates well that most materials will tolerate Ethanol better than Gasoline

DURABILITY OF VARIOUS PLASTICS: ALCOHOLS VS. GASOLINE

 

Ethanol

Methanol

Gasoline

Conventional Polyethylene

good

excellent

poor

High-density Polyethylene

excellent

excellent

good

Teflon

excellent

excellent

excellent

Tefzel

excellent

excellent

excellent

Polypropylene

good

excellent

fair

Polymethylpentene

good

excellent

fair

Polycarbonate

good

fair

fair

Polyvinyl Chloride

good

fair

poor

Excellent: Will tolerate years of exposure.
Fair: Some signs of deterioration after one week of exposure.
Good: No damage after 30 days of exposure, should tolerate several years of exposure.
Poor: Deteriorates readily.
NOTE: All tests were made with liquids at 122 deg F.

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