|Preferred IUPAC name
3D model (JSmol)
|Molar mass||285.34 g·mol−1|
|Melting point||130 °C (266 °F; 403 K)|
|Solubility in alcohol||1 g/15 ml|
|Solubility in ether||1 g/36 ml|
|Solubility in chloroform||1 g/1.7 ml|
|Safety data sheet||MSDS for piperine|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
|Scoville scale||100,000 SHU|
Piperine is extracted from black pepper using dichloromethane. Aqueous hydrotropes can be used in the extraction to result in high yield and selectivity. The amount of piperine varies from 1–2% in long pepper, to 5–10% in commercial white and black peppers. Further, it may be prepared by treating the solvent-free residue from an alcoholic extract of black pepper, with a solution of potassium hydroxide to remove resin (said to contain chavicine, an isomer of piperine) and solution of the washed, insoluble residue in warm alcohol, from which the alkaloid crystallises on cooling.
Piperine yields salts only with strong acids. The platinichloride B4·H2PtCl6 forms orange-red needles ("B" denotes one mole of the alkaloid base in this and the following formulae). Iodine in potassium iodide added to an alcoholic solution of the base in the presence of a little hydrochloric acid gives a characteristic periodide, B2·HI·I2, crystallising in steel-blue needles, melting point 145 °C.
Piperine was discovered in 1819 by Hans Christian Ørsted, who isolated it from the fruits of Piper nigrum, the source plant of both black and white pepper. Piperine was also found in Piper longum and Piper officinarum (Miq.) C. DC. (=Piper retrofractum Vahl), two species called "long pepper".
A component of pungency by piperine results from activation of the heat- and acidity-sensing TRPV ion channels, TRPV1 and TRPA1, on nociceptors, the pain-sensing nerve cells. Piperine is under preliminary research for its potential to affect bioavailability of other compounds in food and dietary supplements, such as a possible effect on the bioavailability of curcumin.
- Piperidine, a cyclic six-membered amine that results from hydrolysis of piperine
- Capsaicin, the active piquant chemical in chili peppers
- Allyl isothiocyanate, the active piquant chemical in mustard, radishes, horseradish, and wasabi
- Allicin, the active piquant flavor chemical in raw garlic and onions (see those articles for discussion of other chemicals in them relating to pungency, and eye irritation)
- The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals (11th ed.), Merck, 1989, p. 7442, ISBN 091191028X
- Epstein, William W.; Netz, David F.; Seidel, Jimmy L. (1993). "Isolation of piperine from black pepper". J. Chem. Educ. 70 (7): 598. doi:10.1021/ed070p598.
- US 6365601, Gaikar, "Process for extraction of piperine from Piper species", issued 2002-04-02
- "Pepper". Tis-gdv.de. Retrieved 2 September 2017.
- Ikan, Raphael (1991). Natural Products: A Laboratory Guide (2nd ed.). San Diego, CA: Academic Press. pp. 223–224. ISBN 0123705517.
- Ørsted, Hans Christian (1820). "Über das Piperin, ein neues Pflanzenalkaloid" [On piperine, a new plant alkaloid]. Schweiggers Journal für Chemie und Physik (in German). 29 (1): 80–82.
- Friedrich A. Fluckiger; Daniel Hanbury (1879). Pharmacographia : a History of the Principal Drugs of Vegetable Origin, Met with in Great Britain and British India. London: Macmillan. p. 584. ASIN B00432KEP2.
- McNamara, F. N.; Randall, A.; Gunthorpe, M. J. (March 2005). "Effects of piperine, the pungent component of black pepper, at the human vanilloid receptor (TRPV1)". British Journal of Pharmacology. 144 (6): 781–790. doi:10.1038/sj.bjp.0706040. PMC . PMID 15685214.
- Shoba, G.; Joy, D.; Joseph, T.; Majeed, M.; Rajendran, R.; Srinivas, P. S. (May 1998). "Influence of piperine on the pharmacokinetics of curcumin in animals and human volunteers". Planta Medica. 64 (4): 353–356. doi:10.1055/s-2006-957450. PMID 9619120.