You are using an unsupported browser. Please upgrade your browser to a newer version to get the best experience on Human Metabolome Database.
Record Information
StatusExpected but not Quantified
Creation Date2005-11-16 15:48:42 UTC
Update Date2020-02-26 21:23:25 UTC
Secondary Accession Numbers
  • HMDB01494
Metabolite Identification
Common NameAcetylphosphate
DescriptionAcetylphosphate, also known as acetyl-p, belongs to the class of organic compounds known as acyl monophosphates. These are organic compounds containing a monophosphate linked to an acyl group. They have the general structure R-CO-P(O)(O)OH, R=H or organyl. Since acetylphosphate synthesis is known to depend on cholinesterase activity, pseudocholinesterase was assumed to participate to a small extent in acetylphosphate synthesis by cancerous serum. It is also an intermediate in pyruvate metabolism. Acetylphosphate is a drug. Acetylphosphate is an extremely weak basic (essentially neutral) compound (based on its pKa). Acetylphosphate exists in all living organisms, ranging from bacteria to humans. acetylphosphate can be converted into acetic acid; which is mediated by the enzyme acylphosphatase-1. It is generated from pyruvate and the formation is catalyzed by pyruvate oxidase (EC: In humans, acetylphosphate is involved in the metabolic disorder called the pyruvate dehydrogenase complex deficiency pathway. It is generated from sulfoacetaldehyde, converted to acetyl-CoA and acetate via phosphate acetyltransferase (EC: and acetate kinase (EC: respectively. Acetylphosphate or actyl phosphate is a compound involved in taurine and hypotaurine metabolism as well as pyruvate metabolism. rep. populaire Roumaine (1960), 5 7-10). Cancerous serum produced 37% less acetylphosphate than normal serum.
Acetic acid, monoanhydride with phosphoric acidChEBI
Acetyl phosphateChEBI
Acetylphosphoric acidChEBI
Monoacetyl phosphateChEBI
Acetate, monoanhydride with phosphateGenerator
Acetyl phosphoric acidGenerator
Monoacetyl phosphoric acidGenerator
Chemical FormulaC2H5O5P
Average Molecular Weight140.0319
Monoisotopic Molecular Weight139.987459782
IUPAC Name(acetyloxy)phosphonic acid
Traditional Nameacetylphosphate
CAS Registry Number590-54-5
InChI Identifier
Chemical Taxonomy
Description belongs to the class of organic compounds known as acyl monophosphates. These are organic compounds containing a monophosphate linked to an acyl group. They have the general structure R-CO-P(O)(O)OH, R=H or organyl.
KingdomOrganic compounds
Super ClassOrganic acids and derivatives
ClassOrganic phosphoric acids and derivatives
Sub ClassPhosphate esters
Direct ParentAcyl monophosphates
Alternative Parents
  • Acyl monophosphate
  • Acetate salt
  • Carboxylic acid salt
  • Monocarboxylic acid or derivatives
  • Carboxylic acid derivative
  • Organic oxygen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Organic salt
  • Organooxygen compound
  • Carbonyl group
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors

Biological location:



Naturally occurring process:


Industrial application:

Biological role:

Physical Properties
Experimental Properties
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
Water Solubility17.8 g/LALOGPS
pKa (Strongest Acidic)1.24ChemAxon
pKa (Strongest Basic)-7.4ChemAxon
Physiological Charge-2ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area83.83 ŲChemAxon
Rotatable Bond Count2ChemAxon
Refractivity23.8 m³·mol⁻¹ChemAxon
Polarizability9.87 ųChemAxon
Number of Rings0ChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Spectrum TypeDescriptionSplash KeyView
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-0002-9000000000-cfae3a8437091232f5d7Spectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)splash10-004i-9100000000-69d8c7734c01156379c8Spectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)splash10-004i-9000000000-2f22bf3e8b4d114a56d4Spectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 40V, Positive (Annotated)splash10-0ufr-9000000000-55ffd7f2d3597806d481Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0002-9100000000-9815fa392fb818a6fab2Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0002-9000000000-f9f47252b65adfe6b7abSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-000w-9000000000-aee29878b0aaf31375caSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-004i-9200000000-30c93bbfd1e1c181a0bdSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-004i-9000000000-3f8df70a36020543d1d7Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-004i-9000000000-5ee765f8651dddb71d5cSpectrum
1D NMR1H NMR SpectrumNot AvailableSpectrum
2D NMR[1H,1H] 2D NMR SpectrumNot AvailableSpectrum
2D NMR[1H,13C] 2D NMR SpectrumNot AvailableSpectrum
Biological Properties
Cellular LocationsNot Available
Biospecimen LocationsNot Available
Tissue Locations
  • Placenta
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDDB02897
Phenol Explorer Compound IDNot Available
FooDB IDFDB022653
KNApSAcK IDC00019559
Chemspider ID181
KEGG Compound IDC00227
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
PubChem Compound186
PDB IDNot Available
ChEBI ID15350
Food Biomarker OntologyNot Available
VMH IDNot Available
MarkerDB ID
Synthesis ReferenceCostakel, O.; Kitzoulesco, I. The possibility of acetylphosphate synthesis in cancerous and noncancerous human serum at pH 4. Rev. sci. Med., Acad. rep. populaire Roumaine (1960), 5 7-10.
Material Safety Data Sheet (MSDS)Download (PDF)
General References
  1. Libeer JC, Scharpe SL, Verkerk RM, Deprettere AJ, Schepens PJ: Simultaneous determination of p-aminobenzoic acid, acetyl-p-aminobenzoic acid and p-aminohippuric acid in serum and urine by capillary gas chromatography with use of a nitrogen-phosphorus detector. Clin Chim Acta. 1981 Sep 10;115(2):119-23. [PubMed:6974621 ]
  2. Dowling TC, Frye RF, Zemaitis MA: Simultaneous determination of p-aminohippuric acid, acetyl-p-aminohippuric acid and iothalamate in human plasma and urine by high-performance liquid chromatography. J Chromatogr B Biomed Sci Appl. 1998 Sep 25;716(1-2):305-13. [PubMed:9824245 ]
  3. Elshenawy S, Pinney SE, Stuart T, Doulias PT, Zura G, Parry S, Elovitz MA, Bennett MJ, Bansal A, Strauss JF 3rd, Ischiropoulos H, Simmons RA: The Metabolomic Signature of the Placenta in Spontaneous Preterm Birth. Int J Mol Sci. 2020 Feb 4;21(3). pii: ijms21031043. doi: 10.3390/ijms21031043. [PubMed:32033212 ]


General function:
Involved in acylphosphatase activity
Specific function:
Its physiological role is not yet clear.
Gene Name:
Uniprot ID:
Molecular weight:
Acetylphosphate + Water → Acetic acid + Phosphatedetails
General function:
Involved in acylphosphatase activity
Specific function:
Its physiological role is not yet clear.
Gene Name:
Uniprot ID:
Molecular weight:
Acetylphosphate + Water → Acetic acid + Phosphatedetails