Adenosine triphosphate (ATP) is an organic compound that provides energy to drive many processes in living cells, such as muscle contraction, nerve impulse propagation, condensate dissolution, and chemical synthesis. Found in all known forms of life, ATP is often referred to as the "molecular unit of currency" of intracellular energy transfer. When consumed in metabolic processes, it converts either to adenosine diphosphate (ADP) or to adenosine monophosphate (AMP). Other processes regenerate ATP. The human body recycles its own body weight equivalent in ATP each day. It is also a precursor to DNA and RNA, and is used as a coenzyme.

Adenosine-5'-triphosphate

Names
IUPAC name Adenosine 5′-(tetrahydrogen triphosphate)
Preferred IUPAC name O1-{[(2R,3S,4R,5R)-5-(6-Amino-9H-purin-9-yl)-3,4-dihydroxyoxolan-2-yl]methyl} tetrahydrogen triphosphate
Identifiers
CAS Number	56-65-5 (free acid) Y 34369-07-8 (disodium salt hydrate) N
3D model (JSmol)	Interactive image Interactive image
ChEBI	CHEBI:15422 Y
ChEMBL	ChEMBL14249 Y
ChemSpider	5742 Y
DrugBank	DB00171 Y
ECHA InfoCard	100.000.258
IUPHAR/BPS	1713
KEGG	C00002 Y
PubChem CID	5957
UNII	8L70Q75FXE Y
CompTox Dashboard (EPA)	DTXSID6022559
InChI InChI=1S/C10H16N5O13P3/c11-8-5-9(13-2-12-8)15(3-14-5)10-7(17)6(16)4(26-10)1-25-30(21,22)28-31(23,24)27-29(18,19)20/h2-4,6-7,10,16-17H,1H2,(H,21,22)(H,23,24)(H2,11,12,13)(H2,18,19,20)/t4-,6-,7-,10-/m1/s1 Y Key: ZKHQWZAMYRWXGA-KQYNXXCUSA-N Y Key: ZKHQWZAMYRWXGA-KQYNXXCUBG
SMILES O=P(O)(O)OP(=O)(O)OP(=O)(O)OC[C@H]3O[C@@H](n2cnc1c(ncnc12)N)[C@H](O)[C@@H]3O c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)COP(=O)(O)OP(=O)(O)OP(=O)(O)O)O)O)N
Properties
Chemical formula	C10H16N5O13P3
Molar mass	507.18 g/mol
Density	1.04 g/cm3 (disodium salt)
Melting point	187 °C (369 °F; 460 K) disodium salt; decomposes
Acidity (pKa)	0.9, 1.4, 3.8, 6.5
UV-vis (λmax)	259 nm
Absorbance	ε259 = 15.4 mM−1 cm−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

Interactive animation of the structure of ATP

From the perspective of biochemistry, ATP is classified as a nucleoside triphosphate, which indicates that it consists of three components: a nitrogenous base (adenine), the sugar ribose, and the triphosphate.