A basic heterocyclic organic compound; a colourless, pungent toxic liquid.
pyridine, nitrogen-containing organic compound, heterocyclic compound, heteroatom, dipole, toxic, pyridine ring, coal tar, vitamin, organic chemistry, chemistry
Molar mass: 79.10 g/mol
Melting point: -42 °C
Boiling point: 115.5 °C
Density: 0.9819 g/cm³
Heat of combustion: -2,351.7 kJ/mol
Pyridine is a colourless, toxic liquid with an unpleasant odour. It is hygroscopic, that is, it binds atmospheric moisture when exposed to air for a longer period of time. The molecule is a dipole, so its boiling point is higher than that of benzene. It dissolves well in water and organic solvents, its aqueous solution is slightly alkalinic. It forms salts with acids, which dissolve well in water.
Occurrence and production
It occurs in large quantities in coal tar. It is produced in a reaction of acetaldehyde with ammonia.
Pyridine is used in to denature alcohol; it is also used in the production of medicines, pesticides and colourings, and as a solvent for organic and inorganic compounds.
The simplest aromatic amine. Its scientific name is phenylamine.
Benzene is the simplest aromatic hydrocarbon.
In benzene there are sigma bonds and delocalised pi bonds between carbon atoms.
A heterocyclic organic compound, its derivatives are thymine, cytosine and uracil.
The simplest of the aromatic carboxylic acids.
A biologically and practically important organic compound.
The simplest polycyclic aromatic hydrocarbon.
A heterocyclic organic compound.
A colourless liquid with an odour similar to benzene. The monomer of polystyrene.