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Record Information
Version5.0
StatusExpected but not Quantified
Creation Date2005-11-16 15:48:42 UTC
Update Date2023-02-21 17:14:42 UTC
HMDB IDHMDB0000310
Secondary Accession Numbers
  • HMDB00310
Metabolite Identification
Common NameMethylacetoacetic acid
DescriptionMethylacetoacetic acid, also known as 3-oxo-butanoate or methyl acetylacetate, belongs to the class of organic compounds known as beta-keto acids and derivatives. These are organic compounds containing an aldehyde substituted with a keto group on the C3 carbon atom. Methylacetoacetic acid is an extremely weak basic (essentially neutral) compound (based on its pKa). Methylacetoacetic acid is a citrus, fresh, and fruity tasting compound. Methylacetoacetic acid has been identified in the urine of patients with an inherited deficiency of propionyl-CoA carboxylase (PMID 630060 ), and after isoleucine loading in the diagnosis of 2-methylacetoacetyl-CoA thiolase deficiency.
Structure
Data?1676999682
Synonyms
ValueSource
MethylacetoacetateGenerator
1-Methoxybutane-1,3-dioneHMDB
3-oxo-ButanoateHMDB
3-oxo-Butanoic acidHMDB
3-oxo-Butanoic acid methyl esterHMDB
3-OxobutanoateHMDB
3-Oxobutanoic acidHMDB
3-Oxobutanoic acid methyl esterHMDB
3-Oxobutyric acid methyl esterHMDB
Acetoacetate methyl esterHMDB
Acetoacetic acid methyl esterHMDB
Acetoacetic methyl esterHMDB
Methyl 3-oxobutanoateHMDB
Methyl 3-oxobutanoic acidHMDB
Methyl 3-oxobutyrateHMDB
Methyl acetoacetateHMDB
Methyl acetylacetateHMDB
Methyl acetylacetonateHMDB
Chemical FormulaC5H8O3
Average Molecular Weight116.1152
Monoisotopic Molecular Weight116.047344122
IUPAC Namemethyl 3-oxobutanoate
Traditional Namemethyl acetoacetate
CAS Registry Number105-45-3
SMILES
COC(=O)CC(C)=O
InChI Identifier
InChI=1S/C5H8O3/c1-4(6)3-5(7)8-2/h3H2,1-2H3
InChI KeyWRQNANDWMGAFTP-UHFFFAOYSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as beta-keto acids and derivatives. These are organic compounds containing an aldehyde substituted with a keto group on the C3 carbon atom.
KingdomOrganic compounds
Super ClassOrganic acids and derivatives
ClassKeto acids and derivatives
Sub ClassBeta-keto acids and derivatives
Direct ParentBeta-keto acids and derivatives
Alternative Parents
Substituents
  • Beta-keto acid
  • Fatty acid ester
  • Fatty acid methyl ester
  • 1,3-dicarbonyl compound
  • Fatty acyl
  • Methyl ester
  • Carboxylic acid ester
  • Ketone
  • Monocarboxylic acid or derivatives
  • Carboxylic acid derivative
  • Organic oxygen compound
  • Organic oxide
  • Carbonyl group
  • Organooxygen compound
  • Hydrocarbon derivative
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External DescriptorsNot Available
Ontology
Physiological effect
Disposition
ProcessNot Available
RoleNot Available
Physical Properties
StateLiquid
Experimental Molecular Properties
PropertyValueReference
Melting Point-80 °CNot Available
Boiling Point169.00 °C. @ 760.00 mm HgThe Good Scents Company Information System
Water Solubility500 mg/mLNot Available
LogP0.185 (est)The Good Scents Company Information System
Experimental Chromatographic PropertiesNot Available
Predicted Molecular Properties
PropertyValueSource
Water Solubility137 g/LALOGPS
logP-0.29ALOGPS
logP0.14ChemAxon
logS0.07ALOGPS
pKa (Strongest Acidic)10.28ChemAxon
pKa (Strongest Basic)-7ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count2ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area43.37 ŲChemAxon
Rotatable Bond Count3ChemAxon
Refractivity27.31 m³·mol⁻¹ChemAxon
Polarizability11.27 ųChemAxon
Number of Rings0ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Predicted Chromatographic Properties

Predicted Collision Cross Sections

PredictorAdduct TypeCCS Value (Å2)Reference
DarkChem[M+H]+125.69431661259
DarkChem[M-H]-120.91531661259
AllCCS[M+H]+127.97432859911
AllCCS[M-H]-125.54332859911
DeepCCS[M+H]+127.22430932474
DeepCCS[M-H]-125.1930932474
DeepCCS[M-2H]-161.1130932474
DeepCCS[M+Na]+135.72530932474
AllCCS[M+H]+128.032859911
AllCCS[M+H-H2O]+123.732859911
AllCCS[M+NH4]+131.932859911
AllCCS[M+Na]+133.132859911
AllCCS[M-H]-125.532859911
AllCCS[M+Na-2H]-128.832859911
AllCCS[M+HCOO]-132.532859911

Predicted Kovats Retention Indices

Underivatized

MetaboliteSMILESKovats RI ValueColumn TypeReference
Methylacetoacetic acidCOC(=O)CC(C)=O1381.7Standard polar33892256
Methylacetoacetic acidCOC(=O)CC(C)=O818.7Standard non polar33892256
Methylacetoacetic acidCOC(=O)CC(C)=O903.8Semi standard non polar33892256

Derivatized

Derivative Name / StructureSMILESKovats RI ValueColumn TypeReference
Methylacetoacetic acid,1TMS,isomer #1COC(=O)C=C(C)O[Si](C)(C)C1099.9Semi standard non polar33892256
Methylacetoacetic acid,1TMS,isomer #1COC(=O)C=C(C)O[Si](C)(C)C1078.1Standard non polar33892256
Methylacetoacetic acid,1TMS,isomer #1COC(=O)C=C(C)O[Si](C)(C)C1348.5Standard polar33892256
Methylacetoacetic acid,1TMS,isomer #2C=C(CC(=O)OC)O[Si](C)(C)C1054.1Semi standard non polar33892256
Methylacetoacetic acid,1TMS,isomer #2C=C(CC(=O)OC)O[Si](C)(C)C1073.7Standard non polar33892256
Methylacetoacetic acid,1TMS,isomer #2C=C(CC(=O)OC)O[Si](C)(C)C1351.0Standard polar33892256
Methylacetoacetic acid,1TBDMS,isomer #1COC(=O)C=C(C)O[Si](C)(C)C(C)(C)C1313.7Semi standard non polar33892256
Methylacetoacetic acid,1TBDMS,isomer #1COC(=O)C=C(C)O[Si](C)(C)C(C)(C)C1266.7Standard non polar33892256
Methylacetoacetic acid,1TBDMS,isomer #1COC(=O)C=C(C)O[Si](C)(C)C(C)(C)C1522.0Standard polar33892256
Methylacetoacetic acid,1TBDMS,isomer #2C=C(CC(=O)OC)O[Si](C)(C)C(C)(C)C1248.6Semi standard non polar33892256
Methylacetoacetic acid,1TBDMS,isomer #2C=C(CC(=O)OC)O[Si](C)(C)C(C)(C)C1269.1Standard non polar33892256
Methylacetoacetic acid,1TBDMS,isomer #2C=C(CC(=O)OC)O[Si](C)(C)C(C)(C)C1527.5Standard polar33892256
Spectra

GC-MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Experimental GC-MSGC-MS Spectrum - Methylacetoacetic acid EI-B (Non-derivatized)splash10-0006-9000000000-9801f4fde1f8c64f6baf2017-09-12HMDB team, MONA, MassBankView Spectrum
Experimental GC-MSGC-MS Spectrum - Methylacetoacetic acid EI-B (Non-derivatized)splash10-0006-9000000000-e4481e7d9e6ac8fc177b2017-09-12HMDB team, MONA, MassBankView Spectrum
Experimental GC-MSGC-MS Spectrum - Methylacetoacetic acid EI-B (Non-derivatized)splash10-0006-9000000000-f8789e71041e62cce3312017-09-12HMDB team, MONA, MassBankView Spectrum
Experimental GC-MSGC-MS Spectrum - Methylacetoacetic acid EI-B (Non-derivatized)splash10-0006-9100000000-65b70a114483f92cc1f42017-09-12HMDB team, MONA, MassBankView Spectrum
Experimental GC-MSGC-MS Spectrum - Methylacetoacetic acid CI-B (Non-derivatized)splash10-00kr-9300000000-7a638e147c3997a855982017-09-12HMDB team, MONA, MassBankView Spectrum
Experimental GC-MSGC-MS Spectrum - Methylacetoacetic acid EI-B (Non-derivatized)splash10-0006-9000000000-9801f4fde1f8c64f6baf2018-05-18HMDB team, MONA, MassBankView Spectrum
Experimental GC-MSGC-MS Spectrum - Methylacetoacetic acid EI-B (Non-derivatized)splash10-0006-9000000000-e4481e7d9e6ac8fc177b2018-05-18HMDB team, MONA, MassBankView Spectrum
Experimental GC-MSGC-MS Spectrum - Methylacetoacetic acid EI-B (Non-derivatized)splash10-0006-9000000000-f8789e71041e62cce3312018-05-18HMDB team, MONA, MassBankView Spectrum
Experimental GC-MSGC-MS Spectrum - Methylacetoacetic acid EI-B (Non-derivatized)splash10-0006-9100000000-65b70a114483f92cc1f42018-05-18HMDB team, MONA, MassBankView Spectrum
Experimental GC-MSGC-MS Spectrum - Methylacetoacetic acid CI-B (Non-derivatized)splash10-00kr-9300000000-7a638e147c3997a855982018-05-18HMDB team, MONA, MassBankView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - Methylacetoacetic acid GC-MS (Non-derivatized) - 70eV, Positivesplash10-0006-9100000000-869c1574ff891034b6652017-09-01Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - Methylacetoacetic acid GC-MS (Non-derivatized) - 70eV, PositiveNot Available2021-10-12Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - Methylacetoacetic acid GC-MS (Non-derivatized) - 70eV, PositiveNot Available2021-10-12Wishart LabView Spectrum

MS/MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Experimental LC-MS/MSLC-MS/MS Spectrum - Methylacetoacetic acid Quattro_QQQ 10V, N/A-QTOF (Annotated)splash10-000l-9100000000-be1b334229aa020fc7e82012-07-24HMDB team, MONAView Spectrum
Experimental LC-MS/MSLC-MS/MS Spectrum - Methylacetoacetic acid Quattro_QQQ 25V, N/A-QTOF (Annotated)splash10-0006-9000000000-e512bbad2ab7f1c253a72012-07-24HMDB team, MONAView Spectrum
Experimental LC-MS/MSLC-MS/MS Spectrum - Methylacetoacetic acid Quattro_QQQ 40V, N/A-QTOF (Annotated)splash10-0006-9000000000-0627dffba19580aa6a7d2012-07-24HMDB team, MONAView Spectrum
Experimental LC-MS/MSLC-MS/MS Spectrum - Methylacetoacetic acid EI-B (HITACHI RMU-7M) , Positive-QTOFsplash10-0006-9000000000-6f423389be91a0d883a22012-08-31HMDB team, MONAView Spectrum
Experimental LC-MS/MSLC-MS/MS Spectrum - Methylacetoacetic acid EI-B (HITACHI RMU-6M) , Positive-QTOFsplash10-0006-9000000000-e4481e7d9e6ac8fc177b2012-08-31HMDB team, MONAView Spectrum
Experimental LC-MS/MSLC-MS/MS Spectrum - Methylacetoacetic acid EI-B (JEOL JMS-D-3000) , Positive-QTOFsplash10-0006-9000000000-970f150ada556d2324642012-08-31HMDB team, MONAView Spectrum
Experimental LC-MS/MSLC-MS/MS Spectrum - Methylacetoacetic acid EI-B (HITACHI RMU-6M) , Positive-QTOFsplash10-0006-9100000000-86a6dd485ea6cf9b06322012-08-31HMDB team, MONAView Spectrum
Experimental LC-MS/MSLC-MS/MS Spectrum - Methylacetoacetic acid CI-B (HITACHI M-80) , Positive-QTOFsplash10-00kr-9300000000-0d967b807194a0d4f1892012-08-31HMDB team, MONAView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Methylacetoacetic acid 10V, Positive-QTOFsplash10-014r-9300000000-e5dc637782adee6c0e042017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Methylacetoacetic acid 20V, Positive-QTOFsplash10-014j-9100000000-3bc03bc80fc348b48f882017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Methylacetoacetic acid 40V, Positive-QTOFsplash10-014u-9000000000-ed2c64d5d7629d00368e2017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Methylacetoacetic acid 10V, Negative-QTOFsplash10-014i-8900000000-26833f2c7b71af9eed1f2017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Methylacetoacetic acid 20V, Negative-QTOFsplash10-0aw9-9200000000-d2941bafc6ef6d37ea382017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Methylacetoacetic acid 40V, Negative-QTOFsplash10-0a59-9000000000-765079c1255f5f8b29072017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Methylacetoacetic acid 10V, Negative-QTOFsplash10-01bc-9400000000-ac614382ccd32f161a652021-09-24Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Methylacetoacetic acid 20V, Negative-QTOFsplash10-0a4i-9000000000-f50f28ce0031ed1ca1af2021-09-24Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Methylacetoacetic acid 40V, Negative-QTOFsplash10-0a4i-9000000000-7ab0f1f6abf2d008ff8e2021-09-24Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Methylacetoacetic acid 10V, Positive-QTOFsplash10-0006-9000000000-d66fe58106ad458e0f712021-09-24Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Methylacetoacetic acid 20V, Positive-QTOFsplash10-0006-9000000000-0c548d0b4e3b334064ce2021-09-24Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Methylacetoacetic acid 40V, Positive-QTOFsplash10-0006-9000000000-87bbaed151efac0845912021-09-24Wishart LabView Spectrum

NMR Spectra

Spectrum TypeDescriptionDeposition DateSourceView
Experimental 1D NMR1H NMR Spectrum (1D, 600 MHz, H2O, experimental)2012-12-04Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 100 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 100 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 200 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 200 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 300 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 300 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 400 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 400 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 500 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 500 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 600 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 600 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 700 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 700 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 800 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 800 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 900 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 900 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 1000 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 1000 MHz, D2O, predicted)2021-09-16Wishart LabView Spectrum
Experimental 2D NMR[1H, 13C]-HSQC NMR Spectrum (2D, 600 MHz, H2O, experimental)2012-12-05Wishart LabView Spectrum

IR Spectra

Spectrum TypeDescriptionDeposition DateSourceView
Predicted IR SpectrumIR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M+H]+)2023-02-03FELIX labView Spectrum
Predicted IR SpectrumIR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M+Na]+)2023-02-03FELIX labView Spectrum
Biological Properties
Cellular LocationsNot Available
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 IDFDB021937
KNApSAcK IDNot Available
Chemspider ID13874867
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN ID5299
PubChem Compound7757
PDB IDNot Available
ChEBI IDNot Available
Food Biomarker OntologyNot Available
VMH IDNot Available
MarkerDB IDNot Available
Good Scents IDrw1014971
References
Synthesis ReferenceChan, Tak-Hang; Brownbridge, Peter. Reaction of electrophiles with 1,3-bis(trimethylsiloxy)-1-methoxybuta-1,3-diene, a dianion equivalent of methyl acetoacetate. Journal of the Chemical Society, Chemical Communications (1979), (13), 578-9.
Material Safety Data Sheet (MSDS)Download (PDF)
General References
  1. Robinson BH, Sherwood WG, Taylor J, Balfe JW, Mamer OA: Acetoacetyl CoA thiolase deficiency: a cause of severe ketoacidosis in infancy simulating salicylism. J Pediatr. 1979 Aug;95(2):228-33. [PubMed:36452 ]
  2. Aramaki S, Lehotay D, Sweetman L, Nyhan WL, Winter SC, Middleton B: Urinary excretion of 2-methylacetoacetate, 2-methyl-3-hydroxybutyrate and tiglylglycine after isoleucine loading in the diagnosis of 2-methylacetoacetyl-CoA thiolase deficiency. J Inherit Metab Dis. 1991;14(1):63-74. [PubMed:1861461 ]
  3. Sweetman L, Weyler W, Nyhan WL, de Cespedes C, Loria AR, Estrada Y: Abnormal metabolites of isoleucine in a patient with propionyl-CoA carboxylase deficiency. Biomed Mass Spectrom. 1978 Mar;5(3):198-207. [PubMed:630060 ]