Here are the nine safety symbols or pictograms and what they mean:
- Exploding bomb - explosives
 - Flame - flammable
 - Flame over circle - oxidising
 - Corrosion - corrosive
 - Skull and Crossbones - acute toxicity
 - Environment - hazardous to the environment
 - Exclamation mark - health hazard/hazardous to the ozone layer
 - Health hazard - serious health hazard
 - Gas cylinder - gas under pressure