描述
4-methylpyridine, also known as 4-mepy or 4-picoline, is a member of the class of compounds known as methylpyridines. Methylpyridines are organic compounds containing a pyridine ring substituted at one or more positions by a methyl group. 4-methylpyridine is soluble (in water) and a very strong basic compound (based on its pKa). 4-methylpyridine can be found in fig and tea, which makes 4-methylpyridine a potential biomarker for the consumption of these food products. 4-methylpyridine is the organic compound with the formula CH3C5H4N. It is one of the three isomers of methylpyridine. This pungent liquid is a building block for the synthesis of other heterocyclic compounds. Its conjugate acid, the 4-methylpyridinium ion, has a pKa of 5.98, about 0.7 units above that of pyridine itself .