Matching Pairs WHMIS Symbols MatchingOnline version Match the symbols to their name by Chelsea Ashworth 1 Infectious or Poisonous Materials 2 Compressed Gas 3 Biohazardous Infectious Materials 4 Flammable Materials 5 Corrosive Substance 6 Oxidizing Materials 7 Materials Causing Other Toxic Effects 8 Materials Considered Dangerously Reactive