A toxic substance means any chemical or mixture that may be harmful to the environment and to human health if inhaled, swallowed, or absorbed through the skin.

High levels of formaldehyde exposure can lead to cancer in the long term, and respiratory problems, skin conditions, and inflammation of the mucus membranes in the short term. Formaldehyde allergies can also cause serious health problems. This chemical is especially dangerous for children.

Asbestos is a soft fibrous grey mineral substance that can be made into fireproof material or used for heat insulation and this material would cause asbestosis – a disease of the lungs caused by inhaling asbestos particles.

Fibreglass presents problems such as irritations of the eyes, skin, or respiratory tract. The mechanical action of the fibre scraping against skin may cause a condition known as dermatitis. The primary hazard associated with fibreglass is the chemicals used during the fabrication or lay up process.

A complex carbohydrate, (C6H10O5)n, that is composed of glucose units, forms the main constituent of the cell wall in most plants, and is important in the manufacture of numerous products, such as paper, textiles, pharmaceuticals, and explosives.