Solvents are liquid or gaseous substances that are widely used in chemistry and industry. They are used to dissolve, dilute or suspend other substances. Solvents are an important component of paints, varnishes, adhesives, cleaning agents, lubricants and many other products.

There are different types of solvents used for different purposes. Polar solvents such as water dissolve polarized substances such as salts, acids and alcohols. Non-polar solvents such as gasoline, oil or acetone dissolve non-polar substances such as fats, waxes and resins. There are also special solvents developed for specific applications, such as acetone for cleaning electronic devices or carbon tetrachloride for dry cleaning.

Although solvents are essential in many industries, they can also be harmful to health and the environment. Many solvents are toxic, volatile and flammable. Some can affect the nervous system, cause cancer, or damage the ozone layer. For this reason, many countries impose strict regulations on the handling of solvents in order to minimize their impact on health and the environment.