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Record Information
StatusDetected and Quantified
Creation Date2005-11-16 15:48:42 UTC
Update Date2019-07-23 05:44:13 UTC
Secondary Accession Numbers
  • HMDB00486
Metabolite Identification
Common Name7-Hydroxyoctanoic acid
Description7-Hydroxyoctanoic acid is a normal metabolite of medium-chain fatty acid oxidation, and is excreted in the urine as 7-hydroxyoctanoyl-beta-D-glucuronide (PMID 8799296 ), and have been found slightly elevated in the urine of persons with abnormal fatty acid metabolism (PMID 2094705 ).
7-Hydroxy-octanoic acidHMDB
7-Hydroxyoctanoic acidMeSH
Chemical FormulaC8H16O3
Average Molecular Weight160.2108
Monoisotopic Molecular Weight160.109944378
IUPAC Name7-hydroxyoctanoic acid
Traditional Name7-hydroxyoctanoic acid
CAS Registry Number17173-14-7
InChI Identifier
Chemical Taxonomy
Description belongs to the class of organic compounds known as medium-chain hydroxy acids and derivatives. These are hydroxy acids with a 6 to 12 carbon atoms long side chain.
KingdomOrganic compounds
Super ClassOrganic acids and derivatives
ClassHydroxy acids and derivatives
Sub ClassMedium-chain hydroxy acids and derivatives
Direct ParentMedium-chain hydroxy acids and derivatives
Alternative Parents
  • Medium-chain hydroxy acid
  • Medium-chain fatty acid
  • Hydroxy fatty acid
  • Fatty acyl
  • Fatty acid
  • Secondary alcohol
  • Carboxylic acid derivative
  • Carboxylic acid
  • Monocarboxylic acid or derivatives
  • Organic oxide
  • Organic oxygen compound
  • Alcohol
  • Carbonyl group
  • Organooxygen compound
  • Hydrocarbon derivative
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors
Physiological effect

Health effect:



Biological location:

Physical Properties
Experimental Properties
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
Water Solubility12.5 g/LALOGPS
pKa (Strongest Acidic)4.87ChemAxon
pKa (Strongest Basic)-1.6ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area57.53 ŲChemAxon
Rotatable Bond Count6ChemAxon
Refractivity42.02 m³·mol⁻¹ChemAxon
Polarizability18.24 ųChemAxon
Number of Rings0ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectrum TypeDescriptionSplash KeyView
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-002f-9300000000-148f7bb902036bf10baaJSpectraViewer | MoNA
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (2 TMS) - 70eV, Positivesplash10-00ri-9630000000-ff7ba9762938b77f93ebJSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, N/A (Annotated)splash10-004j-5900000000-a85c06e01dbb9185392cJSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, N/A (Annotated)splash10-0a4i-9000000000-6e04eb7529ce6e974d15JSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 40V, N/A (Annotated)splash10-0a4i-9000000000-539051793102de67657fJSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-IT , positivesplash10-0006-0900000000-103f59fab4c6985b5819JSpectraViewer | MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-002f-0900000000-7b85c78ff3a04bf2072aJSpectraViewer | MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-002g-5900000000-456b55be2110ab9332d0JSpectraViewer | MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0535-9000000000-12a5e02bb580078c2079JSpectraViewer | MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-0a4i-0900000000-90d367437f32703a6e60JSpectraViewer | MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-052f-1900000000-e6e3ce19cec378f5dc27JSpectraViewer | MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0a4l-9200000000-63558eeb453bb949aab4JSpectraViewer | MoNA
Biological Properties
Cellular Locations
  • Cytoplasm
Biospecimen Locations
  • Feces
  • Urine
Tissue LocationsNot Available
Normal Concentrations
FecesDetected but not Quantified Adult (>18 years old)Both
Abnormal Concentrations
FecesDetected but not Quantified Adult (>18 years old)Both
Colorectal cancer
UrineDetected and Quantified<1-17 umol/mmol creatinineChildren (1 - 13 years old)BothMedium Chain Acyl-CoA Dehydrogenase Deficiency details
UrineDetected and Quantified50.199-156.0228 umol/mmol creatinineChildren (1-13 years old)Not SpecifiedMedium Chain Acyl-CoA Dehydrogenase Deficiency details
UrineDetected and Quantified1.00 (0.00-2.00) umol/mmol creatinineAdult (>18 years old)BothMedium Chain Acyl-CoA Dehydrogenase Deficiency
    • MetaGene: Metabol...
Associated Disorders and Diseases
Disease References
Colorectal cancer
  1. Goedert JJ, Sampson JN, Moore SC, Xiao Q, Xiong X, Hayes RB, Ahn J, Shi J, Sinha R: Fecal metabolomics: assay performance and association with colorectal cancer. Carcinogenesis. 2014 Sep;35(9):2089-96. doi: 10.1093/carcin/bgu131. Epub 2014 Jul 18. [PubMed:25037050 ]
Medium Chain Acyl-CoA Dehydrogenase Deficiency
  1. Gregersen N, Kolvraa S, Rasmussen K, Mortensen PB, Divry P, David M, Hobolth N: General (medium-chain) acyl-CoA dehydrogenase deficiency (non-ketotic dicarboxylic aciduria): quantitative urinary excretion pattern of 23 biologically significant organic acids in three cases. Clin Chim Acta. 1983 Aug 15;132(2):181-91. [PubMed:6616873 ]
  2. Duran M, De Klerk JB, Wadman SK, Bruinvis L, Ketting D: The differential diagnosis of dicarboxylic aciduria. J Inherit Metab Dis. 1984;7 Suppl 1:48-51. [PubMed:6434845 ]
  3. G.Frauendienst-Egger, Friedrich K. Trefz (2017). MetaGene: Metabolic & Genetic Information Center (MIC: METAGENE consortium.
Associated OMIM IDs
  • 114500 (Colorectal cancer)
  • 201450 (Medium Chain Acyl-CoA Dehydrogenase Deficiency)
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FoodDB IDFDB022069
KNApSAcK IDNot Available
Chemspider ID146647
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
PubChem Compound167627
PDB IDNot Available
ChEBI IDNot Available
Synthesis ReferenceSugiyama, Noboru; Gasha, Taketoshi; Kashima, Choji. Macrocyclic dilactone. I. Synthesis of 7-hydroxyoctanoic acid dilactone. Bulletin of the Chemical Society of Japan (1967), 40(11), 02713-14.
Material Safety Data Sheet (MSDS)Not Available
General References
  1. Costa CC, Dorland L, Kroon M, Tavares de Almeida I, Jakobs C, Duran M: 3-, 6- and 7-hydroxyoctanoic acids are metabolites of medium-chain triglycerides and excreted in urine as glucuronides. J Mass Spectrom. 1996 Jun;31(6):633-8. [PubMed:8799296 ]
  2. Pitt JJ: Gas chromatographic-mass spectrometric characterisation of unsaturated dicarboxylic acids in urine. J Chromatogr. 1990 Dec 14;534:182-9. [PubMed:2094705 ]