Carcinogen: Substances that may cause cancer in humans and animals under certain conditions. An example is chromic acid.

Corrosive: Substances that cause visible destruction or permanent change to skin tissue on contact. An example is hydrochloric acid.

Flammable: Liquids with a flash point below 100 F causing the vapor above the liquid to ignite easily. An example is acetone. (Most solvents)

Hepatotoxin: Substances that may cause damage to the liver. An example is chloroform.

Mutagen:  Substances that may cause changes in the genetic material of cells. An example is ethidium bromide.

Nephrotoxin:  Substances that may cause damage to the kidneys. An example is acetonitrile.

Neurotoxin:  Substances that are harmful to the nervous system. An example is acrylamide.

Reactive:  Substances that react strongly or violently. Examples include pyrophorics, oxidizers, explosives. TeratogenSubstances that may affect the development of an embryo or fetus. An example is formamide.