A fragrance tablet having a fragrance selected from the group consisting of synthetic fragrances, natural fragrances and essential oils; and a fragrance tablet delivery device, wherein said fragrance tablet delivery device is water soluble and related method is disclosed. The fragrance tablet dissolves in wash water and mixes with non-fragranced laundry detergent to create a desired scent.

An improved polyurea and chitosan core-shell delivery particles encapsulating a benefit agent is described. Chitosan is pre-modified with a modifying compound which is cationic, anionic, or nonionic. Alternatively the modification is accomplished in situ. The modifying compound is selected from the group consisting of an epoxide, aldehyde, or an ,-unsaturated compound, and is reactive with free amine moieties of chitosan, covalently bonding through CN bonds with the amine moieties of the chitosan. The modifying compound can contain acidic, hydroxyl, and quaternary ammonium groups. The reaction product of the chitosan, the modifying compound along with an electrophile, preferably a polyisocyanate yields a microcapsule with charge, improved release characteristics, improved compatibility or enhanced degradation characteristics, such as in OECD test method 301B.

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

Described herein are compounds including at least one -thio carbonyl or nitrile moiety capable of liberating an active molecule selected from an ,-unsaturated ketone, aldehyde or nitrile. Also described herein are methods of using said compounds in perfumery as well as perfuming compositions or perfumed articles including the compounds. The compounds are represented by formula (I) where: a) m represents an integer from 1 to 6; b) Pro represents a hydrogen atom or a group susceptible of generating an odoriferous ,-unsaturated ketone, aldehyde or nitrile and is represented by the formulae (II) or (II) in which the wavy line indicates the location of the bond between said Pro and the sulfur atom S; and at least one of the Pro groups is of the formula (II) or (II). ##STR00001##