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Record Information
Creation Date2005-11-16 15:48:42 UTC
Update Date2017-09-27 07:40:42 UTC
Secondary Accession Numbers
  • HMDB00525
Metabolite Identification
Common Name5-Hydroxyhexanoic acid
Description5-Hydroxyhexanoic acid is a normal dicarboxylic acid degradation product of fatty acids; however, it has been found in patients with non-ketotic dicarboxylic aciduria and one patient on a diet containing excessive amounts of medium-chain triglycerides. Increased amounts of dicarboxylic acids are excreted in human urine under conditions of medium-chain triglyceride (MCT) feeding, abnormal fatty acid oxidation (FAO) and fasting. Criteria to distinguish dicarboxylic aciduria originating from MCT feeding and other conditions are needed in urinary organic acid profiling for detecting inborn errors of metabolism. Medium-chain triglycerides (MCTs) are absorbed and metabolized differently from long-chain triglycerides (LCTs). MCTs may be useful as a dietary substitute in a variety of clinical disorders. Urinary excretion of 5-hydroxyhexanoic acid, the (omega-1) hydroxylation product, was increased during MCT feeding as compared with LCT feeding in patients with non-insulin-dependent diabetes mellitus. (PMID: 6897376 , 2239769 , 8596483 ).
SynonymsNot Available
Chemical FormulaC6H12O3
Average Molecular Weight132.1577
Monoisotopic Molecular Weight132.07864425
IUPAC NameNot Available
Traditional NameNot Available
CAS Registry Number44843-89-2
SMILESNot Available
InChI Identifier
Chemical Taxonomy
ClassificationNot classified

Biological Location:


  Biofluid and excreta:




Route of exposure:



Naturally occurring process:

  Biological process:

    Chemical reaction:

    Biochemical process:

    Biochemical pathway:


Biological role:

Physical Properties
Experimental Properties
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted PropertiesNot Available
Spectrum TypeDescriptionSplash Key
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, PositiveNot AvailableView in JSpectraViewer
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (2 TMS) - 70eV, PositiveNot AvailableView in JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-014j-6900000000-d6721c752b62f7410232View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-014i-9300000000-74040f00b17b4041c299View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-066r-9000000000-6f7de79a29b2b4c5a8ecView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-001i-2900000000-7460b1bb2fffef236fdeView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-01qi-8900000000-b62d68d9bf86cee6fa5aView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0a4l-9000000000-ca5de42d9cc939f4610bView in MoNA
Biological Properties
Cellular Locations
  • Cytoplasm
Biofluid Locations
  • Blood
  • Feces
  • Urine
Tissue LocationNot Available
PathwaysNot Available
No entries found
Normal Concentrations
BloodExpected but not Quantified Not AvailableNot Available
    FecesDetected but not Quantified Adult (>18 years old)Both
    FecesDetected but not Quantified Not SpecifiedNot Specified
    UrineDetected and Quantified1.1-2.9 umol/mmol creatinineAdult (>18 years old)FemaleNormal details
    UrineDetected and Quantified0.7 (0.1-1.2) umol/mmol creatinineAdolescent (13-18 years old)Both
    UrineDetected and Quantified2.7 (0.8-5.7) umol/mmol creatinineAdult (>18 years old)Both
    UrineDetected and Quantified0.86-1.8 umol/mmol creatinineAdult (>18 years old)MaleNormal details
    UrineDetected and Quantified2.0 (0.1-11.2) umol/mmol creatinineNewborn (0-30 days old)BothNormal details
    UrineDetected and Quantified4.0 (0.1-6.5) umol/mmol creatinineInfant (0-1 year old)BothNormal details
    UrineDetected and Quantified1.0 (0.1-1.6) umol/mmol creatinineChildren (1-13 years old)Both
    Abnormal Concentrations
    FecesDetected but not Quantified Adult (>18 years old)BothColorectal Cancer details
    UrineDetected and Quantified3.5 (0.0-7.0) umol/mmol creatinineAdult (>18 years old)BothMedium Chain Acyl-CoA Dehydrogenase Deficiency details
    UrineDetected and Quantified357.5 (15.00-700.00) umol/mmol creatinineChildren (1-13 years old)BothMedium chain acyl-CoA dehydrogenase deficiency (MCAD) details
    Associated Disorders and Diseases
    Disease References
    Medium Chain Acyl-CoA Dehydrogenase Deficiency
    Associated OMIM IDs
    • 201450 (Medium Chain Acyl-CoA Dehydrogenase Deficiency)
    DrugBank IDNot Available
    DrugBank Metabolite IDNot Available
    Phenol Explorer Compound IDNot Available
    Phenol Explorer Metabolite IDNot Available
    FoodDB IDFDB022093
    KNApSAcK IDNot Available
    Chemspider ID149280
    KEGG Compound IDNot Available
    BioCyc IDNot Available
    BiGG IDNot Available
    Wikipedia LinkNot Available
    METLIN ID5510
    PubChem Compound170748
    PDB IDNot Available
    ChEBI ID131434
    Synthesis ReferenceValentin, H. E.; Schoenebaum, A.; Steinbuechel, A. Identification of 5-hydroxyhexanoic acid, 4-hydroxyheptanoic acid and 4-hydroxyoctanoic acid as new constituents of bacterial polyhydroxyalkanoic acids. Applied Microbiology and Biotechnology (1996), 46(3), 261-267.
    Material Safety Data Sheet (MSDS)Not Available
    General References
    1. Boulat O, Gradwohl M, Matos V, Guignard JP, Bachmann C: Organic acids in the second morning urine in a healthy Swiss paediatric population. Clin Chem Lab Med. 2003 Dec;41(12):1642-58. [PubMed:14708889 ]
    2. Guneral F, Bachmann C: Age-related reference values for urinary organic acids in a healthy Turkish pediatric population. Clin Chem. 1994 Jun;40(6):862-6. [PubMed:8087979 ]
    3. Kamerling JP, Duran M, Bruinvis L, Ketting D, Wadman SK, Vliegenthart JF: The absolute configuration of urinary 5-hydroxyhexanoic acid - a product of fatty acid (omega-1)-oxidation - in patients with non-ketotic dicarboxylic aciduria. Clin Chim Acta. 1982 Nov 10;125(3):247-54. [PubMed:6897376 ]
    4. Niwa T, Meada K, Ohki T, Saito A, Tsuchida I: Gas chromatographic-mass spectrometric profile of organic acids in urine and serum of diabetic ketotic patients. J Chromatogr. 1981 Sep 11;225(1):1-8. [PubMed:6795215 ]
    5. Loftus NJ, Laird WJ, Steel GT, Wilks MF, Woollen BH: Metabolism and pharmacokinetics of deuterium-labelled di-2-(ethylhexyl) adipate (DEHA) in humans. Food Chem Toxicol. 1993 Sep;31(9):609-14. [PubMed:8406236 ]
    6. Brass EP, Tserng KY, Eckel RH: Urinary organic acid excretion during feeding of medium-chain or long-chain triglyceride diets in patients with non-insulin-dependent diabetes mellitus. Am J Clin Nutr. 1990 Nov;52(5):923-6. [PubMed:2239769 ]
    7. Tserng KY, Griffin RL, Kerr DS: Distinction of dicarboxylic aciduria due to medium-chain triglyceride feeding from that due to abnormal fatty acid oxidation and fasting in children. Metabolism. 1996 Feb;45(2):162-7. [PubMed:8596483 ]