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The Phenylpropanals—Floral Aromatic Aldehydes

By: Michael Zviely
Posted: February 24, 2012, from the March 2012 issue of P&F magazine.

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The phenylpropanal family is one of the most important fragrance ingredients, both olfactorily and commercially. This family consists mostly of synthetic molecules having the phenylpropanal moiety.

From the structural point of view, this family’s members start with the most simple structure—3-phenylpropanal (dihydrocinnamaldehyde; FEMA# 2887, CAS# 104-53-0), which has a green, aldehydic, floral and melon odor—toward molecules having different substituents and in various positions on the aromatic ring and/or the side chain. 2-Phenylpropanal (hydratropaldehyde, FEMA# 2886, CAS# 93-53-8) is a side-chain isomer of the basic phenylpropanal structure, and it has a fresh, green leafy-floral, tart, hyacinth odor.

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