The present application relates to fragrance compositions comprising perfume raw materials that resist fragrance habituation, and methods for making and using the fragrance compositions.

A composition containing at least one isomeric alkadienal or at least one isomeric alkadienenitrile in an amount effective to impart a fragrance or flavor to the composition. A fragrance or flavor composition containing at least one isomeric alkadienal or at least one isomeric alkadienenitrile in an amount effective to impart a fragrance or flavor to the composition. A consumer product containing the fragrance or flavor composition having at least one isomeric alkadienal or at least one isomeric alkadienenitrile in an amount effective to impart a fragrance or flavor to the composition. A method of imparting a fragrance or flavor to a consumer product by adding to the consumer product a fragrance or flavor composition containing at least one isomeric alkadienal or at least one isomeric alkadienenitrile in an amount effective to impart a fragrance or flavor to the consumer product.

The present invention addresses the problem of providing a novel compound capable of imparting a highly appealing floral and verdant scent, and a flavor composition and/or fragrance composition containing the same. This compound is a racemic or optically active compound represented by general formula (1).

##STR00001##

In formula (1), the solid and dotted double line indicates a double bond or a single bond, the definition of Y is the same as described in the specification, and * represents an asymmetric carbon atom.

Perfume compositions having controlled spatio-temporal olfactory profiles are described. The disclosure also relates also to a method of measuring said spatial-temporal olfactory profiles of said compositions.

A volatile composition having: (i) greater than 30% of a scented hydrophobic material by weight of the volatile composition, wherein the scented hydrophobic material comprises one or more volatile compounds; and (ii) greater than 20% of a regulating scent intensity (RIS) composition by weight of the volatile composition. The RIS composition has at least two of: a first regulating scent intensity component (RIS component) having a high average vapor pressure (VP); a second RIS component having a medium average VP; and a third RIS component having a low average VP;
The average VP of each of said one or more volatile compounds is lower than at least one of the high, medium and low average VPs of the first, second and third RIS components at the same temperature.

A scent intensity regulating composition (RIS composition). The RIS composition includes at least two of: a first scent intensity regulating component (RIS component) having an average vapor pressure (VP) greater than 0.3 Torr at 25 C.; a second RIS component having an average VP from 0.07 to 0.3 Torr at 25 C.; and a third RIS component having an average VP from 0.0099 to 0.07 Torr at 25 C.
Each of the first, second, and third RIS components is characterized by an Odor Detection Threshold (ODT) of greater than 20 ppb.

Suggested is fragrance composition comprising or consisting of a selection of specific nitriles showing improved stability against decomposition and discoloration.