Record Information
Version1.0
Creation Date2016-07-13 19:48:00 UTC
Update Date2016-07-20 21:00:06 UTC
LmdbLMDB00355
Secondary Accession NumbersNone
Metabolite Identification
Common Namep-Cresol
Descriptionp-Cresol (4-methylphenol), a 108.1 Da volatile low-molecular-weight compound, is a phenol. It is a partially lipophilic moiety which strongly binds to plasma protein (close to 100%) under normal conditions. p-Cresol is metabolized through conjugation, mainly sulphation and glucuronization, but removal of the unconjugated p-cresol is, at least in part, via the urine. Therefore it is not surprising that this compound, together with several other phenoles, is retained when the kidneys fail. P-Cresol is an end-product of protein breakdown, and an increase of the nutritional protein load in healthy individuals results in enhanced generation and urinary excretion. The serum p-cresol concentration in uremic patients can be decreased by changing to a low-protein diet. p-Cresol is one of the metabolites of the amino acid tyrosine, and to a certain extent also of phenylalanine, which are converted to 4-hydroxyphenylacetic acid by intestinal bacteria, before being decarboxylated to p-cresol (putrefaction). The main contributing bacteria are aerobes (mainly enterobacteria), but to a certain extent also anaerobes play a role (mainly Clostridium perfringens). In uremia, modifications in the intestinal flora result in the specific overgrowth of bacteria that are specific p-cresol producers. The administration of antibiotics reduces urinary excretion of p-cresol, as a result of the liquidation of the producing bacteria. Environmental factors might also contribute. The liver cytochrome P450 metabolizes toluene to benzyl alcohol, but also to o-cresol and p-cresol. Toluene is not only used industrially, but it is also the most widely abusively inhaled solvent. Furthermore, p-cresol is a metabolite of menthofuran, one of the metabolites of R-(+)-pulegone, which is found in extracts from the plants Mentha pulegium and Hedeoma pulegioides, commonly known as pennyroyal oil and pennyroyal tea. These extracts are popular as unconventional herbal therapeutic agents and are applied as abortiva, diaphoretics, emmenagogues, and psychedelic drugs. Pennyroyal oil is extensively used for its pleasant mint-like smell in the flavoring industry. The toxicity of pennyroyal oil and menthofuran is well known. Another compound used in traditional medicine, especially in Japan, which is a precursor of p-cresol is wood tar creosote. p-Cresol has been reported to affect several biochemical, biological and physiological functions: (i) it diminishes the oxygen uptake of rat cerebral cortex slices; (ii) it increases the free active drug concentration of warfarin and diazepam; (iii) it has been related to growth retardation in the weanling pig; (iv) it alters cell membrane permeability, at least in bacteria; (v) it induces LDH leakage from rat liver slices; (vi) it induces susceptibility to auditive epileptic crises; and (vii) it blocks cell K+ channels. (PMID: 10570076 ). p-Cresol is a uremic toxin that is at least partially removed by peritoneal dialysis in haemodialysis patients, and has been involved in the progression of renal failure. (MID: 11169029). At concentrations encountered during uremia, p-cresol inhibits phagocyte function and decreases leukocyte adhesion to cytokine-stimulated endothelial cells. (PMID: 14681860 ).
Structure
Thumb
Synonyms
ValueSource
1-Hydroxy-4-methylbenzeneChEBI
4-CresolChEBI
4-HydroxytolueneChEBI
4-MethylphenolChEBI
p-KresolChEBI
p-MethylphenolChEBI
p-Tolyl alcoholChEBI
ParacresolChEBI
1-Methyl-4-hydroxybenzeneHMDB
4-(Pentafluorosulfanyl)phenolHMDB
4-Methyl phenolHMDB
4-Methyl-phenolHMDB
P-CresylateHMDB
P-Cresylic acidHMDB
P-HydroxytolueneHMDB
P-Methyl phenolHMDB
P-MethylhydroxybenzeneHMDB
P-OxytolueneHMDB
P-ToluolHMDB
Paramethyl phenolHMDB
4-Cresol, potassium saltMeSH, HMDB
m-CresolMeSH, HMDB
4-Cresol, aluminum saltMeSH, HMDB
4-Cresol, sodium saltMeSH, HMDB
Para-cresolMeSH, HMDB
Chemical FormulaC7H8O
Average Molecular Weight108.1378
Monoisotopic Molecular Weight108.057514878
IUPAC Name4-methylphenol
Traditional NameP-cresol
CAS Registry Number106-44-5
SMILES
CC1=CC=C(O)C=C1
InChI Identifier
InChI=1S/C7H8O/c1-6-2-4-7(8)5-3-6/h2-5,8H,1H3
InChI KeyIWDCLRJOBJJRNH-UHFFFAOYSA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as para cresols. Para cresols are compounds containing a para cresol moiety, which consists of a benzene ring bearing one hydroxyl group at ring positions 1 and 4.
KingdomOrganic compounds
Super ClassBenzenoids
ClassPhenols
Sub ClassCresols
Direct ParentPara cresols
Alternative Parents
Substituents
  • P-cresol
  • 1-hydroxy-2-unsubstituted benzenoid
  • Toluene
  • Monocyclic benzene moiety
  • Organic oxygen compound
  • Hydrocarbon derivative
  • Organooxygen compound
  • Aromatic homomonocyclic compound
Molecular FrameworkAromatic homomonocyclic compounds
External Descriptors
Ontology
StatusDetected but not Quantified
OriginNot Available
BiofunctionNot Available
ApplicationNot Available
Cellular locationsNot Available
Physical Properties
StateNot Available
Experimental Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
PropertyValueSource
logP1.95ALOGPS
logP2.18ChemAxon
logS-0.67ALOGPS
pKa (Strongest Acidic)10.36ChemAxon
pKa (Strongest Basic)-5.4ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count1ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area20.23 ŲChemAxon
Rotatable Bond Count0ChemAxon
Refractivity33.08 m³·mol⁻¹ChemAxon
Polarizability11.93 ųChemAxon
Number of Rings1ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
Spectra
Spectrum TypeDescriptionSplash KeyView
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-0a4i-5900000000-1d2bdfde621a5af9be73Spectrum
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-0a4i-5900000000-b76093f53701327ab25fSpectrum
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-0a4i-4900000000-7d25deb1e39c6ef4866fSpectrum
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-0a4i-7900000000-15d473146e11e4b049b2Spectrum
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-014l-4900000000-14fef90a661a09457976Spectrum
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-0a4i-5900000000-1d2bdfde621a5af9be73Spectrum
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-0a4i-5900000000-b76093f53701327ab25fSpectrum
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-0a4i-4900000000-7d25deb1e39c6ef4866fSpectrum
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-0a4i-7900000000-15d473146e11e4b049b2Spectrum
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-014l-4900000000-14fef90a661a09457976Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-0a4i-6900000000-27534de20ade11dd5454Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (1 TMS) - 70eV, Positivesplash10-06fr-9700000000-f41dd95ca553de6bafffSpectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, PositiveNot AvailableSpectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)splash10-0a4i-5900000000-ab55ada5cae0538f383eSpectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)splash10-0006-9000000000-385a7a99e0409c7f060dSpectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 40V, Positive (Annotated)splash10-02tl-9000000000-205f4e5245868e9debccSpectrum
LC-MS/MSLC-MS/MS Spectrum - EI-B (VARIAN MAT-44) , Positivesplash10-0a4i-5900000000-fd438231ac0ed75fdf09Spectrum
LC-MS/MSLC-MS/MS Spectrum - EI-B (HITACHI RMU-7M) , Positivesplash10-0a4i-5900000000-b76093f53701327ab25fSpectrum
LC-MS/MSLC-MS/MS Spectrum - EI-B (JEOL JMS-D-3000) , Positivesplash10-0a4i-4900000000-7d25deb1e39c6ef4866fSpectrum
LC-MS/MSLC-MS/MS Spectrum - EI-B (HITACHI M-80B) , Positivesplash10-0a4i-7900000000-0cdab17a1a95f3e65f45Spectrum
LC-MS/MSLC-MS/MS Spectrum - NA 35V, negativesplash10-0a6u-9600000000-276b44cbbdb079cac718Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0a4i-0900000000-cf0bed2b3a203309d9aaSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0a4i-1900000000-4f20c8bd2dde845b499cSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0fb9-9100000000-393b5f734646352622f9Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-0a4i-0900000000-0c45920f40546c2d8944Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0a4i-0900000000-417774c01b748db1609dSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0a4i-9600000000-5583b6dc3ae583b8dab0Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-0a4i-0900000000-3f09649991cc4cfcf1ecSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0a4i-0900000000-3f09649991cc4cfcf1ecSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0006-9000000000-6eb0884733967edc9e6bSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0a4i-3900000000-621936189d60e194cefdSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-056u-9100000000-2740c99af64b11309dfbSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-00kf-9000000000-1c2034d922354f5d6682Spectrum
MSMass Spectrum (Electron Ionization)splash10-0a4i-6900000000-729e6f5bdb0da3ed9dedSpectrum
1D NMR1H NMR SpectrumNot AvailableSpectrum
1D NMR1H NMR SpectrumNot AvailableSpectrum
1D NMR13C NMR SpectrumNot AvailableSpectrum
1D NMR1H NMR SpectrumNot AvailableSpectrum
1D NMR13C NMR SpectrumNot AvailableSpectrum
2D NMR[1H,13C] 2D NMR SpectrumNot AvailableSpectrum
Biological Properties
Cellular LocationsNot Available
Biofluid Locations and Tissue Locations
  • Urine
Concentrations
BiofluidStatusValueConditionSpeciesReferenceDetails
UrineDetected but not QuantifiedNot ApplicableNot AvailablePorcine details
UrineDetected but not QuantifiedNot ApplicableNot AvailablePorcine details
DrugBank IDDB01688
HMDB IDHMDB0001858
FooDB IDFDB008789
Phenol Explorer IDNot Available
KNApSAcK IDC00002645
BiGG IDNot Available
BioCyc IDCPD-108
METLIN ID4236
PDB IDNot Available
Wikipedia LinkP-cresol
Chemspider ID13839082
ChEBI ID17847
PubChem Compound ID2879
Kegg Compound IDC01468
YMDB IDYMDB16061
ECMDB IDECMDB21349
References
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General References
  1. Brunet P, Dou L, Cerini C, Berland Y: Protein-bound uremic retention solutes. Adv Ren Replace Ther. 2003 Oct;10(4):310-20. [14681860 ]
  2. Vanholder R, De Smet R, Lesaffer G: p-cresol: a toxin revealing many neglected but relevant aspects of uraemic toxicity. Nephrol Dial Transplant. 1999 Dec;14(12):2813-5. [10570076 ]