Allergen: A substance capable of causing an allergic reaction in some people.
Carcinogen: A substance that can cause cancer.
Contact dermatitis: Skin inflammation caused by direct contact with a particular substance.
Endocrine disruptor: An exogenous substance or mixture that alters the functions of the endocrine system and induces harmful effects on the health of one or more organs.
Mutagen: An agent/substance that changes the genome (usually DNA) of an organism.
Nephrotoxic: Substance that has a toxic effect on the kidney.
Neurotoxic: A substance that has a toxic effect on the nervous system.
Photosensitizer: A substance that can cause a skin reaction upon exposure to light.
Sensitizer: A substance that can cause a skin or respiratory reaction in a sensitized person.
Toxic: A substance that is harmful to an organism and may be responsible for the development of a disease.