Category:Carcinogens

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v t e Cancer-causing materials and agents (carcinogens)
Cancer Cancer cells
Prominent human carcinogens	Acetaldehyde Arsenic Asbestos Bacteria Helicobacter Pylori Benzo[a]pyrene 1,3-Butadiene Diethylstilbestrol Formaldehyde Ionizing radiation (e.g., from isotopes of plutonium and radium) Tobacco smoke Ultraviolet light Viruses Epstein–Barr Hepatitis B Hepatitis C Human papillomavirus
IARC lists	Group 1 (carcinogenic) Group 2A (probably carcinogenic) Group 2B (possibly carcinogenic) Group 3 (not classifiable)
^#WHO-EM ^‡Withdrawn from market Clinical trials: ^†Phase III ^§Never to phase III