Pyrophosphoric acid

[(Science: chemistry) Two phosphate groups linked by esterification. Released in many of the synthetic steps involving nucleotide triphosphates (e.g. protein and nucleic acid elongation). Rapid cleavage by enzymes that have high substrate affinity ensures that these reactions are essentially irreversible.

Molecular Formula: H₄O₇P₂

InChI: InChI=1/H4O7P2/c1-8(2,3)7-9(4,5)6/h(H2,1,2,3)(H2,4,5,6)/f/h1-2,4-5H

InChIKey: InChIKey=XPPKVPWEQAFLFU-DLYQCVMXCL
SMILES: OP(O)(=O)OP(O)(O)=O

CAS number 2466-09-3

Names:
    Diphosphate
    diphosphoric acid
    H4P2O7
    NCIStruc2_000426
    phosphonooxyphosphonic acid
    PPi
    Pyrophosphate
    Pyrophosphoric acid
    [(HO)2P(O)OP(O)(OH)2]

Registries:
    PubChem CID 1023
    CAS 2466-09-3 (from NIST)
    ChEBI 29888
    chemPDB PPV
    Gmelin 82619
    Kegg C00013
    PubChem ID 11459833
    PubChem ID 3315