Skull and Crossbones
Lab Safety Signs
The skull and crossbones is used to indicate the presence of a toxic or poisonous material.
Silsor, Wikipedia CommonsMore Lab Safety Information
Chemistry Laboratory Safety RulesHow to Use MSDSsCommon Names for Chemicals
Poisonous Chemicals
Chemical Weapons & Warfare AgentsWhat Is the Most Poisonous Compound?Incompatible Chemical Mixtures
