4picoline
4picoline, also known as 4-methylpyridine, is an organic compound with the chemical formula C5H5N. It is a derivative of pyridine, where a hydrogen atom at the 4-position is replaced by a methyl group. 4picoline is a colorless liquid at room temperature, with a boiling point of 122°C and a melting point of -37°C. It is soluble in water, ethanol, and ether, but insoluble in hydrocarbons. The compound is commonly used as a building block in organic synthesis, particularly in the preparation of various pharmaceuticals and agrochemicals. It is also used as a ligand in coordination chemistry and as a solvent in various chemical reactions. 4picoline is classified as a volatile organic compound and may have potential health and environmental impacts, so it should be handled with care.