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Record Information
Version5.0
StatusDetected but not Quantified
Creation Date2021-09-11 20:37:26 UTC
Update Date2022-11-23 21:39:02 UTC
HMDB IDHMDB0258842
Secondary Accession NumbersNone
Metabolite Identification
Common Name2-Ethoxy-2-methylpropane
Descriptiontert-butyl ethyl ether, also known as 2-methyl-2-ethoxypropane or ETBE, belongs to the class of organic compounds known as dialkyl ethers. These are organic compounds containing the dialkyl ether functional group, with the formula ROR', where R and R' are alkyl groups. Based on a literature review a significant number of articles have been published on tert-butyl ethyl ether. This compound has been identified in human blood as reported by (PMID: 31557052 ). 2-ethoxy-2-methylpropane is not a naturally occurring metabolite and is only found in those individuals exposed to this compound or its derivatives. Technically 2-Ethoxy-2-methylpropane is part of the human exposome. The exposome can be defined as the collection of all the exposures of an individual in a lifetime and how those exposures relate to health. An individual's exposure begins before birth and includes insults from environmental and occupational sources.
Structure
Thumb
Synonyms
ValueSource
2-Methyl-2-ethoxypropaneChEBI
ETBEChEBI
Ethyl t-butyl etherChEBI
Ethyl tert-butyl etherChEBI
t-BuOEtChEBI
t-Butyl ethyl etherChEBI
Ethyl tertiary-butyl etherMeSH
2-Ethoxy-2-methylpropaneMeSH
Chemical FormulaC6H14O
Average Molecular Weight102.177
Monoisotopic Molecular Weight102.104465071
IUPAC Name2-ethoxy-2-methylpropane
Traditional Nameethyl tert-butyl ether
CAS Registry NumberNot Available
SMILES
CCOC(C)(C)C
InChI Identifier
InChI=1S/C6H14O/c1-5-7-6(2,3)4/h5H2,1-4H3
InChI KeyNUMQCACRALPSHD-UHFFFAOYSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as dialkyl ethers. These are organic compounds containing the dialkyl ether functional group, with the formula ROR', where R and R' are alkyl groups.
KingdomOrganic compounds
Super ClassOrganic oxygen compounds
ClassOrganooxygen compounds
Sub ClassEthers
Direct ParentDialkyl ethers
Alternative Parents
Substituents
  • Dialkyl ether
  • Hydrocarbon derivative
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External DescriptorsNot Available
Ontology
Physiological effectNot Available
Disposition
ProcessNot Available
RoleNot Available
Physical Properties
StateNot Available
Experimental Molecular Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Experimental Chromatographic PropertiesNot Available
Predicted Molecular Properties
PropertyValueSource
logP1.82ALOGPS
logP1.54ChemAxon
logS-1.2ALOGPS
pKa (Strongest Basic)-4.2ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count1ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area9.23 ŲChemAxon
Rotatable Bond Count2ChemAxon
Refractivity31.57 m³·mol⁻¹ChemAxon
Polarizability12.92 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
DeepCCS[M+H]+129.63530932474
DeepCCS[M-H]-126.98330932474
DeepCCS[M-2H]-163.3430932474
DeepCCS[M+Na]+138.12930932474
AllCCS[M+H]+124.432859911
AllCCS[M+H-H2O]+120.232859911
AllCCS[M+NH4]+128.332859911
AllCCS[M+Na]+129.532859911
AllCCS[M-H]-128.132859911
AllCCS[M+Na-2H]-132.332859911
AllCCS[M+HCOO]-136.932859911

Predicted Retention Times

Underivatized

Chromatographic MethodRetention TimeReference
Measured using a Waters Acquity ultraperformance liquid chromatography (UPLC) ethylene-bridged hybrid (BEH) C18 column (100 mm × 2.1 mm; 1.7 μmparticle diameter). Predicted by Afia on May 17, 2022. Predicted by Afia on May 17, 2022.3.35 minutes32390414
Predicted by Siyang on May 30, 202216.2524 minutes33406817
Predicted by Siyang using ReTip algorithm on June 8, 20224.51 minutes32390414
Fem_Long = Waters ACQUITY UPLC HSS T3 C18 with Water:MeOH and 0.1% Formic Acid1998.6 seconds40023050
Fem_Lipids = Ascentis Express C18 with (60:40 water:ACN):(90:10 IPA:ACN) and 10mM NH4COOH + 0.1% Formic Acid638.8 seconds40023050
Life_Old = Waters ACQUITY UPLC BEH C18 with Water:(20:80 acetone:ACN) and 0.1% Formic Acid234.0 seconds40023050
Life_New = RP Waters ACQUITY UPLC HSS T3 C18 with Water:(30:70 MeOH:ACN) and 0.1% Formic Acid410.6 seconds40023050
RIKEN = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid172.7 seconds40023050
Eawag_XBridgeC18 = XBridge C18 3.5u 2.1x50 mm with Water:MeOH and 0.1% Formic Acid683.1 seconds40023050
BfG_NTS_RP1 =Agilent Zorbax Eclipse Plus C18 (2.1 mm x 150 mm, 3.5 um) with Water:ACN and 0.1% Formic Acid707.8 seconds40023050
HILIC_BDD_2 = Merck SeQuant ZIC-HILIC with ACN(0.1% formic acid):water(16 mM ammonium formate)150.6 seconds40023050
UniToyama_Atlantis = RP Waters Atlantis T3 (2.1 x 150 mm, 5 um) with ACN:Water and 0.1% Formic Acid1206.9 seconds40023050
BDD_C18 = Hypersil Gold 1.9µm C18 with Water:ACN and 0.1% Formic Acid447.1 seconds40023050
UFZ_Phenomenex = Kinetex Core-Shell C18 2.6 um, 3.0 x 100 mm, Phenomenex with Water:MeOH and 0.1% Formic Acid1440.9 seconds40023050
SNU_RIKEN_POS = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid490.0 seconds40023050
RPMMFDA = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid392.5 seconds40023050
MTBLS87 = Merck SeQuant ZIC-pHILIC column with ACN:Water and :ammonium carbonate568.4 seconds40023050
KI_GIAR_zic_HILIC_pH2_7 = Merck SeQuant ZIC-HILIC with ACN:Water and 0.1% FA589.0 seconds40023050
Meister zic-pHILIC pH9.3 = Merck SeQuant ZIC-pHILIC column with ACN:Water 5mM NH4Ac pH9.3 and 5mM ammonium acetate in water76.0 seconds40023050

Predicted Kovats Retention Indices

Underivatized

MetaboliteSMILESKovats RI ValueColumn TypeReference
Tert-Butyl ethyl etherCCOC(C)(C)C711.7Standard polar33892256
Tert-Butyl ethyl etherCCOC(C)(C)C618.8Standard non polar33892256
Tert-Butyl ethyl etherCCOC(C)(C)C615.5Semi standard non polar33892256
Spectra

GC-MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted GC-MSPredicted GC-MS Spectrum - 2-Ethoxy-2-methylpropane GC-MS (Non-derivatized) - 70eV, Positivesplash10-0a6r-9000000000-d2fefe17dd9632af761a2021-09-23Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - 2-Ethoxy-2-methylpropane 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 - 2-Ethoxy-2-methylpropane 10V, Positive-QTOFsplash10-0udi-2900000000-c880e8854263db134cd82016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Ethoxy-2-methylpropane 20V, Positive-QTOFsplash10-0f6t-9300000000-826cb2965a401a2f4d492016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Ethoxy-2-methylpropane 40V, Positive-QTOFsplash10-0a6r-9000000000-4a012762fbc31cd7300d2016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Ethoxy-2-methylpropane 10V, Negative-QTOFsplash10-0udi-1900000000-058d99b4e5c05fb850fb2016-08-04Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Ethoxy-2-methylpropane 20V, Negative-QTOFsplash10-0uk9-9800000000-5947fbbd61f0f16a66bf2016-08-04Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Ethoxy-2-methylpropane 40V, Negative-QTOFsplash10-00di-9000000000-bf3e0064ab5bb47600252016-08-04Wishart LabView Spectrum
Biological Properties
Cellular LocationsNot Available
Biospecimen Locations
  • Blood
Tissue LocationsNot Available
Pathways
Normal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
BloodDetected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal details
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FooDB IDNot Available
KNApSAcK IDNot Available
Chemspider ID11996
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkEthyl_tert-butyl_ether
METLIN IDNot Available
PubChem CompoundNot Available
PDB IDNot Available
ChEBI ID141564
Food Biomarker OntologyNot Available
VMH IDNot Available
MarkerDB IDNot Available
Good Scents IDNot Available
References
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General References
  1. Barupal DK, Fiehn O: Generating the Blood Exposome Database Using a Comprehensive Text Mining and Database Fusion Approach. Environ Health Perspect. 2019 Sep;127(9):97008. doi: 10.1289/EHP4713. Epub 2019 Sep 26. [PubMed:31557052 ]