Lab Safety Reference

Fluorine (F) - Extremely reactive, toxic gas. Can cause severe burns.
Chlorine (Cl) - Toxic gas, respiratory irritant. Used in WWI as chemical weapon.
Mercury (Hg) - Toxic heavy metal. Vapors are dangerous. Causes neurological damage.
Lead (Pb) - Cumulative poison. Causes developmental issues, especially in children.
Arsenic (As) - Highly toxic. Historical poison of choice.
Thallium (Tl) - Extremely toxic. Once used as rat poison.
Plutonium (Pu) - Radioactive, toxic. Alpha emitter dangerous if inhaled.
Polonium (Po) - Intensely radioactive. Used in assassination of Alexander Litvinenko.

Substances that can catch fire easily. Keep away from heat, sparks, and open flames.

Can cause or intensify fire. Keep away from flammable materials.

Can cause severe skin burns and eye damage. Handle with appropriate protection.

Can cause death or serious health effects. Avoid all contact and inhalation.

May cause skin or eye irritation. Use appropriate protection.

Emits ionizing radiation. Requires special handling and shielding.