Editing Adenosine triphosphate (section)

==Chemical properties==
Salts of ATP can be isolated as colorless solids.<ref>{{Merck13th}}</ref>
[[File:ATP-ADP.svg|thumb|upright=1.5|The cycles of synthesis and degradation of ATP; 2 and 1 represent input and output of energy, respectively.]]

ATP is stable in aqueous solutions between [[pH]]&nbsp;6.8 and 7.4 (in the absence of catalysts).  At more extreme pH levels, it rapidly [[hydrolyses]] to ADP and phosphate. Living cells maintain the ratio of ATP to ADP at a point ten orders of magnitude from equilibrium, with ATP concentrations fivefold higher than the concentration of ADP.<ref name=Nicholls>{{cite book |last1=Ferguson |first1=S.&nbsp;J. |last2=Nicholls |first2=David |last3=Ferguson |first3=Stuart |title=Bioenergetics 3 |publisher=Academic |location=San Diego, CA |year=2002 |isbn=978-0-12-518121-1 |edition=3rd}}</ref><ref name="Stryer p376">{{cite book |first1=J.&nbsp;M. |last1=Berg |first2=J.&nbsp; L. |last2=Tymoczko |first3=L. |last3=Stryer | title = Biochemistry |url=https://archive.org/details/biochemistry200100jere |url-access=registration | publisher = W.&nbsp;H. Freeman | year = 2003 | location = New York, NY | page = [https://archive.org/details/biochemistry200100jere/page/376 376] |isbn = 978-0-7167-4684-3}}</ref> In the context of biochemical reactions, the P-O-P bonds are frequently referred to as [[high-energy phosphate|''high-energy bonds'']].<ref>{{cite journal |last1=Chance|first1= B. |last2=Lees|first2= H. |last3=Postgate|first3= J.&nbsp;G. | title = The Meaning of "Reversed Electron Flow" and "High Energy Electron" in Biochemistry|doi=10.1038/238330a0|journal = Nature | volume = 238 | pages = 330–331 | year = 1972 | pmid = 4561837 | issue = 5363 |bibcode= 1972Natur.238..330C |s2cid= 4298762 }}</ref>