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Record Information
StatusDetected and Quantified
Creation Date2006-05-22 15:12:01 UTC
Update Date2020-02-26 21:24:13 UTC
Secondary Accession Numbers
  • HMDB02658
Metabolite Identification
Common Name6-Hydroxynicotinic acid
Description6-Hydroxynicotinic acid (6-OHNA) is exploited in the use of NMR spectroscopy or gas chromatography--mass spectrometry for the diagnosis of Pseudomonas aeruginosa in urinary tract infection. Among the common bacteria causing urinary infection, only P. aeruginosa produces 6-hydroxynicotinic acid from nicotinic acid. Pseudomonas aeruginosa infection has been reported to be the third leading cause of urinary infection, accounting for 11% of such infections, the first and second being Escherichia coli and Klebsiella pneumonia, respectively. Analyses of the NMR spectra of the bacterial media with variable cell count of P. aeruginosa, shows that the intensity of the signals of the 6-hydroxynicotinic acid increases with increasing number of bacterial cells. (PMID: 3926801 , 15759292 ). 6-hydroxynicotinic acid can also be found in Achromobacter and Serratia ( (
1,6-Dihydro-6-oxo-3-pyridinecarboxylic acidHMDB
1,6-Dihydro-6-oxo-nicotinic acidHMDB
2-Hydroxypyridine-5-carboxylic acidHMDB
2-Pyridone-5-carboxylic acidHMDB
6-Hydroxy-nicotinic acidHMDB
6-Hydroxypyridine-3-carboxylic acidHMDB
6-Hydroxynicotinic acidKEGG
Chemical FormulaC6H5NO3
Average Molecular Weight139.1088
Monoisotopic Molecular Weight139.026943031
IUPAC Name6-hydroxypyridine-3-carboxylic acid
Traditional Name6-hydroxynicotinic acid
CAS Registry Number5006-66-6
InChI Identifier
Chemical Taxonomy
Description belongs to the class of organic compounds known as pyridinecarboxylic acids. Pyridinecarboxylic acids are compounds containing a pyridine ring bearing a carboxylic acid group.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassPyridines and derivatives
Sub ClassPyridinecarboxylic acids and derivatives
Direct ParentPyridinecarboxylic acids
Alternative Parents
  • Pyridine carboxylic acid
  • Hydroxypyridine
  • Heteroaromatic compound
  • Azacycle
  • Monocarboxylic acid or derivatives
  • Carboxylic acid
  • Carboxylic acid derivative
  • Organic nitrogen compound
  • Organic oxygen compound
  • Organopnictogen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Organooxygen compound
  • Organonitrogen compound
  • Aromatic heteromonocyclic compound
Molecular FrameworkAromatic heteromonocyclic compounds
External Descriptors

Biological location:



Naturally occurring process:

Physical Properties
Experimental Properties
Melting Point310 °CNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
Water Solubility13.7 g/LALOGPS
pKa (Strongest Acidic)3.77ChemAxon
pKa (Strongest Basic)0.51ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area70.42 ŲChemAxon
Rotatable Bond Count1ChemAxon
Refractivity33.45 m³·mol⁻¹ChemAxon
Polarizability12.31 ųChemAxon
Number of Rings1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Spectrum TypeDescriptionSplash KeyView
GC-MSGC-MS Spectrum - GC-EI-TOF (Pegasus III TOF-MS system, Leco; GC 6890, Agilent Technologies) (Non-derivatized)splash10-014i-1690000000-133fa3cce9e59e8b53a9Spectrum
GC-MSGC-MS Spectrum - GC-MS (2 TMS)splash10-014i-2790000000-e603f3ef71d861b6c58fSpectrum
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-014i-0290000000-8fed092a7657e583c5d7Spectrum
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-014i-1690000000-133fa3cce9e59e8b53a9Spectrum
GC-MSGC-MS Spectrum - GC-MS (Non-derivatized)splash10-014i-2790000000-e603f3ef71d861b6c58fSpectrum
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-014i-2790000000-3e2e99cadebe36280a89Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-007a-8900000000-ec493835a384bb643581Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (2 TMS) - 70eV, Positivesplash10-02mi-9760000000-b9c1d6de28d6f1526e6fSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Negativesplash10-000i-1900000000-c2874566b889f07322c6Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Negativesplash10-000f-9800000000-79d5e1067ef5dc7a1ac8Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Negativesplash10-000f-9800000000-64f4c9b54adbcf50e4f2Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Negativesplash10-0006-9400000000-c052843ee5e55f4051a9Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Negativesplash10-0006-9000000000-4e7b7d18474bf24300d6Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) , Negativesplash10-0006-9100000000-a528aab22cb1f9af4380Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-000i-1900000000-c2874566b889f07322c6Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-000f-9800000000-deb0d54a79b61d71a9fcSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-000f-9800000000-64f4c9b54adbcf50e4f2Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-0006-9400000000-c052843ee5e55f4051a9Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-0006-9000000000-4e7b7d18474bf24300d6Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , negativesplash10-0006-9100000000-a528aab22cb1f9af4380Spectrum
LC-MS/MSLC-MS/MS Spectrum - , negativesplash10-0006-9000000000-1d37eb18ba0244214554Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Positivesplash10-0fb9-9400000000-bca0e5c9a959c7a9be6cSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Positivesplash10-056r-9300000000-03e6711f1fe2eb0fba23Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Positivesplash10-0a4i-9100000000-e0803e84466b5985c3b2Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Positivesplash10-0a4i-9000000000-b9b83bf3dff7e6c924faSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Positivesplash10-0006-9000000000-0191434ea4b20d4f055bSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) , Positivesplash10-0006-1900000000-349f5be72008a76679c5Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) 30V, Positivesplash10-0096-9600000000-1b3d37aa49ae31d7e29cSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , positivesplash10-0fb9-9400000000-f3f7cac93e02959bf634Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , positivesplash10-056r-9300000000-83afe01d9035d8d824a5Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , positivesplash10-0a4i-9100000000-e0803e84466b5985c3b2Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , positivesplash10-0a4i-9000000000-b9b83bf3dff7e6c924faSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , positivesplash10-0006-9000000000-0191434ea4b20d4f055bSpectrum
1D NMR1H NMR SpectrumNot AvailableSpectrum
2D NMR[1H,13C] 2D NMR SpectrumNot AvailableSpectrum
Biological Properties
Cellular LocationsNot Available
Biospecimen Locations
  • Feces
  • Urine
Tissue LocationsNot Available
Normal Concentrations
FecesDetected but not Quantified Adult (>18 years old)Both
FecesDetected but not Quantified Adult (>18 years old)Both
FecesDetected but not Quantified Adult (>18 years old)Both
UrineDetected but not Quantified Adult (>18 years old)Both
UrineDetected but not Quantified Adult (>18 years old)BothNormal details
Abnormal Concentrations
FecesDetected but not Quantified Adult (>18 years old)Both
Colorectal cancer
FecesDetected but not Quantified Adult (>18 years old)Both
Colorectal cancer
FecesDetected but not Quantified Adult (>18 years old)BothColorectal Cancer details
UrineDetected and Quantified0.5 (0.0-1.0) umol/mmol creatinineAdult (>18 years old)Both
Prostate Cancer
UrineDetected but not Quantified Adult (>18 years old)BothAutosomal dominant polycystic kidney disease (ADPKD) details
UrineDetected but not Quantified Adult (>18 years old)Both
Diabetes mellitus
Associated Disorders and Diseases
Disease References
Colorectal cancer
  1. Brown DG, Rao S, Weir TL, O'Malia J, Bazan M, Brown RJ, Ryan EP: Metabolomics and metabolic pathway networks from human colorectal cancers, adjacent mucosa, and stool. Cancer Metab. 2016 Jun 6;4:11. doi: 10.1186/s40170-016-0151-y. eCollection 2016. [PubMed:27275383 ]
  2. Sinha R, Ahn J, Sampson JN, Shi J, Yu G, Xiong X, Hayes RB, Goedert JJ: Fecal Microbiota, Fecal Metabolome, and Colorectal Cancer Interrelations. PLoS One. 2016 Mar 25;11(3):e0152126. doi: 10.1371/journal.pone.0152126. eCollection 2016. [PubMed:27015276 ]
  3. 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 ]
Prostate cancer
  1. Sreekumar A, Poisson LM, Rajendiran TM, Khan AP, Cao Q, Yu J, Laxman B, Mehra R, Lonigro RJ, Li Y, Nyati MK, Ahsan A, Kalyana-Sundaram S, Han B, Cao X, Byun J, Omenn GS, Ghosh D, Pennathur S, Alexander DC, Berger A, Shuster JR, Wei JT, Varambally S, Beecher C, Chinnaiyan AM: Metabolomic profiles delineate potential role for sarcosine in prostate cancer progression. Nature. 2009 Feb 12;457(7231):910-4. doi: 10.1038/nature07762. [PubMed:19212411 ]
Autosomal dominant polycystic kidney disease
  1. Gronwald W, Klein MS, Zeltner R, Schulze BD, Reinhold SW, Deutschmann M, Immervoll AK, Boger CA, Banas B, Eckardt KU, Oefner PJ: Detection of autosomal dominant polycystic kidney disease by NMR spectroscopic fingerprinting of urine. Kidney Int. 2011 Jun;79(11):1244-53. doi: 10.1038/ki.2011.30. Epub 2011 Mar 9. [PubMed:21389975 ]
Diabetes mellitus type 2
  1. Llorach R, Urpi-Sarda M, Tulipani S, Garcia-Aloy M, Monagas M, Andres-Lacueva C: Metabolomic fingerprint in patients at high risk of cardiovascular disease by cocoa intervention. Mol Nutr Food Res. 2013 Jun;57(6):962-73. doi: 10.1002/mnfr.201200736. Epub 2013 May 2. [PubMed:23637065 ]
Associated OMIM IDs
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FooDB IDFDB023041
KNApSAcK IDC00007415
Chemspider ID65756
KEGG Compound IDC01020
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem Compound72924
PDB IDNot Available
ChEBI ID16168
Food Biomarker OntologyNot Available
VMH IDNot Available
Synthesis ReferenceBoyer, J. H.; Schoen, W. 6-Hydroxynicotinic acid. Organic Syntheses (1956), 36 44-6.
Material Safety Data Sheet (MSDS)Download (PDF)
General References
  1. Gupta A, Dwivedi M, Nagana Gowda GA, Ayyagari A, Mahdi AA, Bhandari M, Khetrapal CL: (1)H NMR spectroscopy in the diagnosis of Pseudomonas aeruginosa-induced urinary tract infection. NMR Biomed. 2005 Aug;18(5):293-9. [PubMed:15759292 ]
  2. Shiraishi S, Sakamoto N, Maeda K, Ohki T, Hosoi M, Ohta K, Yamanaka N: Availability of 6-hydroxynicotinic acid for rapid identification of Pseudomonas aeruginosa and Serratia marcescens. J Chromatogr. 1985 Feb 27;338(1):51-9. [PubMed:3926801 ]