Ammonia is a common chemical you will find in toilet cleaners and industrial-strength cleaners. It is very potent, pungent and is used to kill bacteria.

Methanol is a form of alcohol that is derived from wood. Methanol is toxic to humans and is known to cause blindness and death.

Acidic gases and organic acid that is typically found in vinegar it has a very pungent smell and sour taste. In large doses it can be toxic to humans it is also found in photographic film and wood glue.

Butane is a liquid compound that is typically found in letter fluid or used for gas grills. It is a highly combustible and flammable gas that is also known to be toxic to humans.

Methane is a principal component of natural gas. Methane gas is responsible for the increasing development of the greenhouse effect and deterioration of the ozone layer on the earth. High levels of methane gas can be potent or toxic to humans. It is also believed that methane is a key ingredient for global warming.

Cadmium is the type of metal very close to sink or mercury. Cadmium is known to cause corrosion on steel and metal surfaces.

Arsenic is a poisonous chemical compound that contains and is derived from several toxic metals. Arsenic is typically found in pesticides, herbicides, insecticides and various alloys it can also be used to kill small animals such as rats, scorpions and other insects.

Stearic Acid is a waxy white substance that is a fatty acid. It is found in animal and vegetable fats, and is a component that is used to make candles, plastics, oil pastels, and cosmetics.

Nicotine is a substance that comes from plants typically from tobacco that is a highly addictive chemical. This chemical has negative effects on the human body and due to its addictive nature is hard for most people to quit.

Toluene is the main component that is found in paint thinners. Toluene when inhaled has intoxicating properties which can cause severe neurological harm.

Hexamine is a crystal like compound that is typically found in plastics. Hexamine also has medical uses that are typically used to treat urinary tract infections by doctors and medical professionals.

Carbon monoxide is a gas that is emitted from cars, it is very poisonous to humans and many people die from carbon monoxide poisoning. Although there are only trace amounts found with cigarettes its poisonous and dangerous to the body.