Chemicals and their harmful effects
19. Tar : is a black liquid derived from the destructive distillation of organic matter. Most tar is produced from coal as a byproduct of coal production.
Use : it is used for the flavoring for candies and alcohol as an anti -dandruff agent in shampoos as a disinfectant and as a component of cosmetics.
Health Risks: Studies have shown an increased risk of MI.
20. Vinyl chloride : Also known as chloroethene is an important industrial chemical and is chiefly used to produce its polymer, polyvinyl chloride (PVC).
Use : Vinyl chloride's is mainly as an aerosol propellant. It was briefly used as an anesthetic however due to its toxic effects its use was abandoned.