A - little or no action B - moderate action C - strong action S - unknown FLUID OR MATERIAL CONVEYED NR NBR EPDM HYPALON® Sea water A A A A Sewage B A C A Silicate esters S B S S Silicate of soda A S A A Silicone grease A A A A Silicone oil A A A A Silver nitrate A B A A Skydrol 500B S S S C Soap solutions B A B A Soda ash A A A A Soda lime B S B B Soda, caustic B S B B Sodium acetate C S C C Sodium aluminate A S A A Sodium bicarbonate A A A A Sodium bisulphate B A B A Sodium bisulphite B A B A Sodium borate A A A A Sodium chloride A A A A Sodium cyanide C C C A Sodium dichromate C S C B Sodium Hypochlorite C S B A Sodium metaphosphate B B B B Sodium nitrate A S A A Sodium perborate B B B A Sodium peroxide B S B B Sodium Silicate A S A A Sodium Thiosulfate A S A A Soybean oil C A C B Stannic chloride A S A A Steam, max 176°C C C C S Stearic acid C B C C Stoddarts solvent C A C C Styrene C C C C Sulphamic acid B B B B Sulphonic acid C C C B Sulphur C S C B/C Sulphur dioxide C S C B Sulphur trioxide C S C S Sulphuric acid ?fuming C C C C Sulphuric acid 30% C S C A Sulphuric acid 50% C S C A Sulphuric acid 75% C S C A Sulphuric acid 96% C S C B Sulphuric acid 98% C S C C Sulphurous acid 10% B S B A Sulphurous acid 85% C S C A