Acids

Corrosive. Damages skin, eye, lung, etc.

Acrylamide

Damages nervous system.

Alkaline solutions

Corrosive. Damages skin, eye, lung, etc.

Chloroform

Damages liver and kidneys.

Ethidium bromide

Carcinogenic.

Formaldehyde

Skin rashes, puffy eyes, headaches, and respiratory problems.

Formamide

Liver and kidney toxicity, CNS depression.

Mercury, lead, silver

Accumulates in bones, long term toxic effects.

Phenol

Skin burns.

Radioactive material

Cancer and damages to multiple organs.