A - little or no action B - moderate action C - strong action S - unknown FLUID OR MATERIAL CONVEYED NR NBR EPDM HYPALON® Iodine C S C A Iron acetate C S B S Iron salts A A A A Isoamyl acetate C S B S Isoamyl alcohol A A A A Isoamyl bromide C S C S Isobutane C A C S Isobutyl acetate C S S C Isobutyl aldehyde C C B B Isobutyl amine B B A B Isobutyl bromide C C C C Isobutyl carbinol A A A A Isobutyl cloride C C C C Isobutyl ether C C S C Isobutylene C B C C Isooctane C A C C Isopentane C A C C Isopropanol amine B B S C Isopropyl acetate C C S C Isopropyl alcohol A A A A Isopropyl amine B B A C Isopropyl benzene C S C C Isopropyl ether C C C C Isopropyl toluene C C C C