Pyridine

Pyridine is an organic compound with the molecular formula C5H5N.

Formula
C5H5N
Molar mass
79.1 g/mol
Also known as
Azabenzene, Azine, Pyridin, Piridina, Pirydyna, RCRA waste number U196

Overview

Pyridine is an organic compound with the molecular formula C5H5N.

Identifiers

Formula
C5H5N
Molar mass
79.1 g/mol
Also known as
Azabenzene, Azine, Pyridin, Piridina, Pirydyna, RCRA waste number U196
Chemical identifiers
SMILES
C1=CC=NC=C1
InChI
InChI=1S/C5H5N/c1-2-4-6-5-3-1/h1-5H
PubChem CID
1049

Properties

Melting Point
-41.6 °C
Boiling Point
115.2-115.3 °C
Relative density (water = 1)
Relative density (water = 1): 0.98
Water solubility
Miscible with water @ 20 °C

References

  1. PubChem Compound Summary: Pyridine (CID 1049)National Center for Biotechnology Information · PubChem

    Identity, molecular formula, molecular weight and aliases retrieved via PUG REST on 2026-09-08.

  2. Hazardous Substances Data Bank (HSDB): Pyridine — melting pointHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/1049#section=Melting-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc., 1996., p. 1370

  3. Hazardous Substances Data Bank (HSDB): Pyridine — boiling pointHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/1049#section=Boiling-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc., 1996., p. 1370

  4. ILO-WHO International Chemical Safety Cards (ICSCs): Pyridine — densityILO-WHO International Chemical Safety Cards (ICSCs)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/1049#section=Density. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred.

  5. Hazardous Substances Data Bank (HSDB): Pyridine — solubilityHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/1049#section=Solubility. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Kirk-Othmer Encyclopedia of Chemical Technology. 3rd ed., Volumes 1-26. New York, NY: John Wiley and Sons, 1978-1984., p. V19 (1982) 454-83