Pyridine is a colorless, flammable liquid with a distinctive odor, commonly found in various industrial applications. It has the chemical formula C5H5N and is classified as a heterocyclic aromatic compound due to its nitrogen atom within a six-membered ring. Pyridine is often used as a solvent and in the synthesis of pharmaceuticals, agrochemicals, and dyes. This compound is naturally present in coal tar and can also be produced through chemical processes. Pyridine is known for its basic properties, making it useful in organic chemistry as a building block for more complex molecules. Its derivatives, such as pyridine-2-carboxylic acid, have important roles in various chemical reactions.