Putrescine is a foul-smelling organic chemical compound NH2(CH2)4NH2 (1,4-diaminobutane or butanediamine) that is related to cadaverine; both are produced by the breakdown of amino acids in living and dead organisms and both are toxic in large doses. The two compounds are largely responsible for the foul odor of putrefying flesh, but also contribute to the odor of such processes as bad breath and bacterial vaginosis. They are also found in semen and some microalgae, together with related molecules like spermine and spermidine.
|Preferred IUPAC name
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||88.154 g·mol−1|
|Melting point||27.5 °C (81.5 °F; 300.6 K)|
|Boiling point||158.6 °C; 317.4 °F; 431.7 K|
|Vapor pressure||2.33 mm Hg at 25 deg C (est)|
|3.54x10−10 atm-cu m/mol at 25 deg C (est)|
Refractive index (nD)
|GHS Signal word||Danger|
|H228, H302, H312, H314, H331|
|P210, P261, P280, P305+351+338, P310|
|Flash point||51 °C (124 °F; 324 K)|
|Lethal dose or concentration (LD, LC):|
LD50 (median dose)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Putrescine is produced on an industrial scale by hydrogenation of succinonitrile, which is produced by addition of hydrogen cyanide to acrylonitrile. Putrescine is reacted with adipic acid to yield the polyamide Nylon 46, which is marketed by DSM under the trade name Stanyl. Biotechnological production of putrescine from renewable feedstock is a promising alternative to the chemical synthesis. A metabolically engineered strain of Escherichia coli that produces putrescine at high titer in glucose mineral salts medium has been described.
Spermidine synthase uses putrescine and S-adenosylmethioninamine (decarboxylated S-adenosyl methionine) to produce spermidine. Spermidine in turn is combined with another S-adenosylmethioninamine and gets converted to spermine.
Putrescine is synthesized in small quantities by healthy living cells by the action of ornithine decarboxylase.
Putrescine is synthesized biologically via two different pathways, both starting from arginine.
- In one pathway, arginine is converted into agmatine, with a reaction catalyzed by the enzyme arginine decarboxylase (ADC); then agmatine is transformed into N-carbamoylputrescine by agmatine imino hydroxylase (AIH). Finally, N-carbamoylputrescine is converted into putrescine.
- In the second pathway, arginine is converted into ornithine and then ornithine is converted into putrescine by ornithine decarboxylase (ODC).
The polyamines, of which putrescine is one of the simplest, appear to be growth factors necessary for cell division.
When heated to decomposition, putrescine emits toxic fumes of NOx.
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Ornithine is converted by bowel bacteria into a toxic substance called putrescine, which in turn degrades into polyamines, such as spermadine, spermine, and cadaverine (literally meaning "the essence of dead cadavers").
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- Ludwig Brieger, "Weitere Untersuchungen über Ptomaine" [Further investigations into ptomaines] (Berlin, Germany: August Hirschwald, 1885), page 43. From page 43: Ich nenne dasselbe Putrescin, von putresco, faul werden, vermodern, verwesen. (I call this [compound] "putrescine", from [the Latin word] putresco, to become rotten, decay, rot.)
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- Izquierdo, C; Gomez-Tamayo, JC; Nebel, J-C; Pardo, L; Gonzalez, A (2018). "Identifying human diamine sensors for death related putrescine and cadaverine molecules". PLOS Computational Biology. 14 (1): e1005945. Bibcode:2018PLSCB..14E5945I. doi:10.1371/journal.pcbi.1005945. PMC 5783396. PMID 29324768.
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- Srivenugopal KS, Adiga PR (September 1981). "Enzymic conversion of agmatine to putrescine in Lathyrus sativus seedlings. Purification and properties of a multifunctional enzyme (putrescine synthase)". J. Biol. Chem. 256 (18): 9532–41. PMID 6895223.
- Til, H.P.; Falke, H.E.; Prinsen, M.K.; Willems, M.I. (1997). "Acute and subacute toxicity of tyramine, spermidine, spermine, putrescine and cadaverine in rats". Food and Chemical Toxicology. 35 (3–4): 337–348. doi:10.1016/S0278-6915(97)00121-X. ISSN 0278-6915. PMID 9207896.
- "Hazardous Substances Data Bank (HSDB).” U.S. National Library of Medicine, National Institutes of Health.