Toluene is a clear, colorless liquid with a distinctive smell, commonly used as an industrial solvent. Its chemical formula is C7H8, and it's a hydrocarbon that belongs to the aromatic class. Toluene is used in various applications, including in paints, paint thinners, adhesives, and as a starting material for synthesizing other chemicals. It is also used as a fuel additive and in the production of benzene and xylene. However, it can be toxic if inhaled or ingested in large amounts, so proper handling and safety precautions are essential.