The molecular weight of benzene is 78 grams per mole. Its chemical formula is C6H6 and it's classified as a hydrocarbon. The compound is found in a ring system with conjugated double bonds.
Benzene can be either colorless or a very light yellow liquid at room temperature. It has a very sweet odor and is extremely flammable. The compound is found naturally in the environment and is an important part of crude oil.
It's also created by many human activities, including smoking. Tobacco cigarettes release benzene into the atmosphere and can be detrimental the smoker’s health. When inhaled frequently, benzene can cause a decrease in red blood cells, damage the smoker’s immune system, and affect a woman’s menstrual cycle.