焦磷酸

{{Chembox
| ImageFile = Pyrophosphoric-acid-2D.png
| ImageName = 焦磷酸的结构
| ImageFile1 = Pyrophosphoric-acid-3D-vdW.png
| ImageName1 = 焦磷酸的3D模型
| IUPACName = Diphosphoric acid
μ-oxido-bis(dihydroxidooxidophosphorus)
| Section1 =
| Section2 = {{Chembox Properties
| Formula = H4P2O7
| MolarMass = 177.98
| Density =
|Appearance=白色到浅黄色固体
| MeltingPt = 61 °C
|pKa2=2.36

:\mathrm{2 \ H_3PO_4 \ \xrightarrow{\triangle} \ H_4P_2O_7 + H_2O}

纯焦磷酸则可以通过磷酸和三氯氧化磷反应而成：

:\mathrm{5 \ H_3PO_4 + POCl_3 \longrightarrow 3 \ H_4P_2O_7 + 3 \ HCl}

外部連結

• [http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=217793 Pyrophosphoric acid at PubChem]

参考资料