Cigarette smoke contains over 4,000 chemicals, including 43 known cancer-causing (carcinogenic) compounds and 400 other toxins. These cigarette ingredients include nicotine, tar, and carbon monoxide, as well as formaldehyde, ammonia, hydrogen cyanide, arsenic, and DDT. There are too many chemicals in smoke to list, but here are some examples. Fungicides and pesticides -- Cause many types of cancers and birth defects. Cadmium -- Linked to lung and prostate cancer. Benzene -- Linked to leukemia. Formaldehyde -- Linked to lung cancer. Nickel -- Causes increased susceptibility to lung infections. There are more than 4,000 ingredients in a cigarette other than tobacco. Common additives include yeast, wine, caffeine, beeswax and chocolate. Here are some other ingredients: Ammonia: Household cleaner Angelica root extract: Known to cause cancer in animals Arsenic: Used in rat poisons Benzene: Used in making dyes, synthetic rubber Butane: Gas; used in lighter fluid Carbon monoxide: Poisonous gas Cadmium: Used in batteries Cyanide: Deadly poison DDT: A banned insecticide Ethyl Furoate: Causes liver damage in animals Lead: Poisonous in high doses Formaldehiyde: Used to preserve dead specimens Methoprene: Insecticide Megastigmatrienone: Chemical naturally found in grapefruit juice Maltitol: Sweetener for diabetics Napthalene: Ingredient in mothballs Methyl isocyanate: Its accidental release killed 2000 people in Bhopal, India in 1984 Polonium: Cancer-causing radioactive element.