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Record Information
Version5.0
StatusExpected but not Quantified
Creation Date2012-09-11 18:40:39 UTC
Update Date2023-02-21 17:23:44 UTC
HMDB IDHMDB0033902
Secondary Accession Numbers
  • HMDB33902
Metabolite Identification
Common NameIsopentyl mercaptan
DescriptionIsopentyl mercaptan belongs to the class of organic compounds known as alkylthiols. These are organic compounds containing the thiol functional group linked to an alkyl chain. Isopentyl mercaptan is a glue and onion tasting compound. Isopentyl mercaptan has been detected, but not quantified in, alcoholic beverages. This could make isopentyl mercaptan a potential biomarker for the consumption of these foods. Based on a literature review very few articles have been published on Isopentyl mercaptan.
Structure
Data?1677000224
Synonyms
ValueSource
1-mercapto-3-MethylbutaneHMDB
2-Methyl-4-butanethiolHMDB
3-Methyl-1-butanethiolHMDB
3-Methyl-1-butylthiolHMDB
3-Methylbutane-1-thiolHMDB
3-MethylbutanethiolHMDB
FEMA 3858HMDB
Isoamyl mercaptanHMDB
Isoamyl sulfhydrateHMDB
Isoamyl thioalcoholHMDB
IsoamylthiolHMDB
IsopentanethiolHMDB
Thioisoamyl alcoholHMDB
Chemical FormulaC5H12S
Average Molecular Weight104.214
Monoisotopic Molecular Weight104.065971074
IUPAC Name3-methylbutane-1-thiol
Traditional Nameisoamylthiol
CAS Registry Number541-31-1
SMILES
CC(C)CCS
InChI Identifier
InChI=1S/C5H12S/c1-5(2)3-4-6/h5-6H,3-4H2,1-2H3
InChI KeyGIJGXNFNUUFEGH-UHFFFAOYSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as alkylthiols. These are organic compounds containing the thiol functional group linked to an alkyl chain.
KingdomOrganic compounds
Super ClassOrganosulfur compounds
ClassThiols
Sub ClassAlkylthiols
Direct ParentAlkylthiols
Alternative Parents
Substituents
  • Alkylthiol
  • Hydrocarbon derivative
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External DescriptorsNot Available
Ontology
Physiological effect
Disposition
ProcessNot Available
Role
Physical Properties
StateNot Available
Experimental Molecular Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling Point119.00 to 120.00 °C. @ 760.00 mm HgThe Good Scents Company Information System
Water Solubility599.2 mg/L @ 25 °C (est)The Good Scents Company Information System
LogP2.670The Good Scents Company Information System
Experimental Chromatographic PropertiesNot Available
Predicted Molecular Properties
PropertyValueSource
Water Solubility0.62 g/LALOGPS
logP2.85ALOGPS
logP2.34ChemAxon
logS-2.2ALOGPS
pKa (Strongest Acidic)10.2ChemAxon
pKa (Strongest Basic)-9.6ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count0ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area0 ŲChemAxon
Rotatable Bond Count2ChemAxon
Refractivity32.71 m³·mol⁻¹ChemAxon
Polarizability13.1 ųChemAxon
Number of Rings0ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleNoChemAxon
Predicted Chromatographic Properties

Predicted Collision Cross Sections

PredictorAdduct TypeCCS Value (Å2)Reference
DarkChem[M+H]+120.46831661259
DarkChem[M-H]-114.52931661259
DeepCCS[M+H]+131.11530932474
DeepCCS[M-H]-128.93130932474
DeepCCS[M-2H]-164.54630932474
DeepCCS[M+Na]+139.12530932474
AllCCS[M+H]+123.632859911
AllCCS[M+H-H2O]+119.432859911
AllCCS[M+NH4]+127.632859911
AllCCS[M+Na]+128.832859911
AllCCS[M-H]-137.432859911
AllCCS[M+Na-2H]-142.232859911
AllCCS[M+HCOO]-147.432859911

Predicted Kovats Retention Indices

Underivatized

MetaboliteSMILESKovats RI ValueColumn TypeReference
Isopentyl mercaptanCC(C)CCS983.8Standard polar33892256
Isopentyl mercaptanCC(C)CCS776.7Standard non polar33892256
Isopentyl mercaptanCC(C)CCS807.6Semi standard non polar33892256

Derivatized

Derivative Name / StructureSMILESKovats RI ValueColumn TypeReference
Isopentyl mercaptan,1TMS,isomer #1CC(C)CCS[Si](C)(C)C1031.5Semi standard non polar33892256
Isopentyl mercaptan,1TMS,isomer #1CC(C)CCS[Si](C)(C)C1006.4Standard non polar33892256
Isopentyl mercaptan,1TBDMS,isomer #1CC(C)CCS[Si](C)(C)C(C)(C)C1246.7Semi standard non polar33892256
Isopentyl mercaptan,1TBDMS,isomer #1CC(C)CCS[Si](C)(C)C(C)(C)C1222.5Standard non polar33892256
Spectra

GC-MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Experimental GC-MSGC-MS Spectrum - Isopentyl mercaptan EI-B (Non-derivatized)splash10-0596-9000000000-008ee604b11d844c18462017-09-12HMDB team, MONA, MassBankView Spectrum
Experimental GC-MSGC-MS Spectrum - Isopentyl mercaptan EI-B (Non-derivatized)splash10-0596-9000000000-008ee604b11d844c18462018-05-18HMDB team, MONA, MassBankView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - Isopentyl mercaptan GC-MS (Non-derivatized) - 70eV, Positivesplash10-0006-9000000000-21846781cf355f8f18062017-09-01Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - Isopentyl mercaptan GC-MS (Non-derivatized) - 70eV, PositiveNot Available2021-10-12Wishart LabView Spectrum

MS/MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isopentyl mercaptan 10V, Positive-QTOFsplash10-0a4i-3900000000-f73ca253abf58b5ba7ac2015-04-24Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isopentyl mercaptan 20V, Positive-QTOFsplash10-0ab9-7900000000-eaf94077084d0b0ac66f2015-04-24Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isopentyl mercaptan 40V, Positive-QTOFsplash10-0ab9-9000000000-d31b9cb208e5cb86b4982015-04-24Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isopentyl mercaptan 10V, Negative-QTOFsplash10-0udi-3900000000-1454d0db78f2f94258b52015-04-25Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isopentyl mercaptan 20V, Negative-QTOFsplash10-0udi-4900000000-48b7bb95a24deb9a02c72015-04-25Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isopentyl mercaptan 40V, Negative-QTOFsplash10-001i-9000000000-3f4055b3bab6ebed33ec2015-04-25Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isopentyl mercaptan 10V, Positive-QTOFsplash10-0ab9-9800000000-f5564e66c6cad09529e42021-09-22Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isopentyl mercaptan 20V, Positive-QTOFsplash10-05fr-9000000000-51ade429ff6c001849a02021-09-22Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isopentyl mercaptan 40V, Positive-QTOFsplash10-052f-9000000000-a7b2ea948977e8822eec2021-09-22Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isopentyl mercaptan 10V, Negative-QTOFsplash10-0udi-0900000000-daaf7f02535bb79206ea2021-09-22Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isopentyl mercaptan 20V, Negative-QTOFsplash10-0udi-0900000000-0cd329184247ea390a542021-09-22Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isopentyl mercaptan 40V, Negative-QTOFsplash10-001i-9000000000-942ac689538269d6ca7b2021-09-22Wishart LabView Spectrum

IR Spectra

Spectrum TypeDescriptionDeposition DateSourceView
Predicted IR SpectrumIR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M-H]-)2023-02-04FELIX labView Spectrum
Predicted IR SpectrumIR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M+H]+)2023-02-04FELIX labView Spectrum
Predicted IR SpectrumIR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M+Na]+)2023-02-04FELIX labView Spectrum
Biological Properties
Cellular Locations
  • Membrane
Biospecimen LocationsNot Available
Tissue LocationsNot Available
Pathways
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FooDB IDFDB012097
KNApSAcK IDNot Available
Chemspider ID10462
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem Compound10925
PDB IDNot Available
ChEBI IDNot Available
Food Biomarker OntologyNot Available
VMH IDNot Available
MarkerDB IDNot Available
Good Scents IDrw1108121
References
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General References
  1. (). Yannai, Shmuel. (2004) Dictionary of food compounds with CD-ROM: Additives, flavors, and ingredients. Boca Raton: Chapman & Hall/CRC.. .