Heliotropin (piperonal)
Heliotropin, or piperonal, is an organic compound which is commonly found in fragrances and flavors. Its odor is sweet and flowery, reminiscent of heliotrope.
- Type
- Sirovina
- Olfactive family
- Cvetni
- Source
- Prepared from isosafrole or catechol; occurs naturally in various plants
- Chemical class
- Aromatic aldehyde
Miris
Detaljno
Zanimljivosti
Due to their role in the manufacture of MDMA, safrole, isosafrole and piperonal are Category I precursors under regulation no. 273/2004 of the European Community.
Dobijanje i hemija
Način dobijanja
Piperonal can be prepared by the oxidative cleavage of isosafrole or by using a multistep sequence from catechol or 1,2-methylenedioxybenzene. Synthesis from 1,2-methylenedioxybenzene is accomplished through a condensation reaction with glyoxylic acid followed by cleaving the resulting α-hydroxy acid with an oxidizing agent. Synthesis from catechol requires an additional step, Williamson ether synthesis using dichloromethane.
- Formula
- C₈H₆O₃
- CAS
- 120-57-0
- Izgled
- Colorless or white crystals
- Jačina mirisa
- Srednji
- Trajnost
- 212 hours at 100%
- Sinonimi
- Piperonal, heliotropine, piperonyl aldehyde, protocatechuic aldehyde methylene ether, piperonaldehyde, geliotropin, heliobase
No IFRA Standard for the material itself (51st Amendment)
- Tačka ključanja
- 263.00 to 265.00 °C. @ 760.00 mm Hg
- Tačka topljenja
- 37.00 to 39.00 °C. @ 760.00 mm Hg
- Tačka paljenja
- > 230.00 °F. TCC ( > 110.00 °C. )
U parfemima
Piperonal is commonly used to add vanilla or almond nuances, generally imparting balsamic, powdery, and floral aspects to a scent's character. Piperonal is used in powdery accords and also in florals such as muguet, carnation and lilac. Piperonal gives softness and creaminess. In flavors it adds hay-like, floral and powdery notes to a wide range of food preparations. Piperonal is used heavily in French vanilla flavors, in part as a replacement for coumarin which is no longer GRAS.
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