A - little or no action B - moderate action C - strong action S - unknown FLUID OR MATERIAL CONVEYED NR NBR EPDM HYPALON® Gallic acid S C B C Gas, coke C B S A Gas, liquified petrol C B C S Gasoline C A C C Gluconic acid C C S B Glucose A B B A Glycerine A A A A Glycil alcohol S S S S Glycolic acid S S S S Glycols A A A A Grease C A C S Green sulphate liquor A B A A