Octanoic acid

Octanoic acid is an organic compound with the molecular formula C8H16O2.

Formula
C8H16O2
Functional group
Carboxylic acids
Molar mass
144.21 g/mol
Also known as
caprylic acid, n-octanoic acid, n-caprylic acid, Octylic acid, octoic acid, n-octylic acid

Overview

Octanoic acid is an organic compound with the molecular formula C8H16O2.

Identifiers

Formula
C8H16O2
Functional group
Carboxylic acids
Molar mass
144.21 g/mol
Also known as
caprylic acid, n-octanoic acid, n-caprylic acid, Octylic acid, octoic acid, n-octylic acid
Chemical identifiers
SMILES
CCCCCCCC(=O)O
InChI
InChI=1S/C8H16O2/c1-2-3-4-5-6-7-8(9)10/h2-7H2,1H3,(H,9,10)
PubChem CID
379

Properties

Melting Point
16.5 °C
Boiling Point
239 °C
Water solubility
In water 789 mg/L at 30 °C
Data availability

Not published: Density.

Related compounds

References

  1. PubChem Compound Summary: Octanoic acid (CID 379)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): Octanoic acid — melting pointHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/379#section=Melting-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Lide, D.R. CRC Handbook of Chemistry and Physics 86TH Edition 2005-2006. CRC Press, Taylor & Francis, Boca Raton, FL 2005, p. 3-404

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

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/379#section=Boiling-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Lide, D.R. CRC Handbook of Chemistry and Physics 86TH Edition 2005-2006. CRC Press, Taylor & Francis, Boca Raton, FL 2005, p. 3-404

  4. Hazardous Substances Data Bank (HSDB): Octanoic acid — solubilityHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/379#section=Solubility. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Yalkowsky SH, Dannenfelser RM; Aquasol Database of Aqueous Solubility. Version 5. College of Pharmacy, Univ of Ariz - Tucson, AZ. PC Version (1992)