CHEBI:39949 - triphosphoric acid

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ChEBI Name triphosphoric acid
ChEBI ID CHEBI:39949
Stars This entity has been manually annotated by the ChEBI Team.
Secondary ChEBI IDs CHEBI:39942, CHEBI:29203
Supplier Information ZINC000006827739
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Triphosphoric acid (also tripolyphosphoric acid), with formula H5P3O10, is a condensed form of phosphoric acid. In the family of phosphoric acids, it is the next polyphosphoric acid after pyrophosphoric acid, H4P2O7, also called diphosphoric acid. Compounds such as ATP (adenosine triphosphate) are esters of triphosphoric acid. Triphosphoric acid has not been obtained in crystalline form. The equilibrium mixture with an overall composition corresponding to H5P3O10 contains about 20% of triphosphoric acid. A solution of the pure species can be obtained by ion exchange of the sodium salt, sodium triphosphate, at 0 °C. Triphosporic acid is a pentaprotic acid, meaning that it can release five protons in basic enough conditions. Sources differ on the corresponding pKa values: 1.0; 2.2; 2.3; 5.7; 8.5 1.0; 2.2; 2.3; 3.7; 8.5 small; small; 2.30; 6.50; 9.24
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Formula H5O10P3
Net Charge 0
Average Mass 257.95498
Monoisotopic Mass 257.90956
InChI InChI=1S/H5O10P3/c1-11(2,3)9-13(7,8)10-12(4,5)6/h(H,7,8)(H2,1,2,3)(H2,4,5,6)
InChIKey UNXRWKVEANCORM-UHFFFAOYSA-N
SMILES OP(O)(=O)OP(O)(=O)OP(O)(O)=O
Roles Classification
Chemical Role(s): inorganic acid
A Bronsted acid derived from one or more inorganic compounds. Inorganic acids (also known as mineral acids) form hydrons and conjugate base ions when dissolved in water.
(via pnictogen oxoacid )
Bronsted acid
A molecular entity capable of donating a hydron to an acceptor (Bronsted base).
(via oxoacid )
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ChEBI Ontology
Outgoing triphosphoric acid (CHEBI:39949) is a acyclic phosphorus acid anhydride (CHEBI:37786)
triphosphoric acid (CHEBI:39949) is a phosphorus oxoacid (CHEBI:33457)
triphosphoric acid (CHEBI:39949) is conjugate acid of triphosphate(1−) (CHEBI:48313)
Incoming triphosphate(1−) (CHEBI:48313) is conjugate base of triphosphoric acid (CHEBI:39949)
triphosphate group (CHEBI:32959) is substituent group from triphosphoric acid (CHEBI:39949)
IUPAC Names
1,7-dihydrido-2,4,6-trihydroxido-2,4,6-trioxido-1,3,5,7-tetraoxy-2,4,6-triphosphy-[7]catena
bis(dihydroxidodioxidophosphato)hydroxidooxidophosphorus
μ-[hydroxidotrioxidophosphato(2−)-O,2κO]-bis(dihydroxidooxidophosphorus)
pentahydroxido-2O,2κO,3κ2O-di-μ-oxido-trioxido-O,2κO,3κO-triphosphorus
Synonyms Sources
acide triphosphorique ChEBI
catena-triphosphoric acid IUPAC
H5P3O10 IUPAC
Inorganic triphosphate KEGG COMPOUND
TRIPHOSPHATE PDBeChem
Triphosphoric acid KEGG COMPOUND
Triphosphorsäure ChEBI
tripolyphosphoric acid ChEBI
Manual Xrefs Databases
3PO PDBeChem
C00536 KEGG COMPOUND
DB03896 DrugBank
FDB028913 FooDB
HMDB0003379 HMDB
Triphosphoric_acid Wikipedia
View more database links
Registry Numbers Types Sources
10380-08-2 CAS Registry Number ChemIDplus
185379 Gmelin Registry Number Gmelin
Last Modified
15 May 2024