Almost certainly Diethyl Phthalate (DEP), a widely used perfumery solvent and diluent. On a blotter it is essentially odorless with at most a very faint, slightly sweet plasticky trace. Used as a carrier and mild fixative rather than for its own scent.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 372.
Viscous liquid.
Very soluble in water, soluble in alcohol and most perfume oils.
Very faint, winey-ethereal odor.
In high concentration somewhat bitter taste, in weaker solutions rather sweet, bland, non-descript taste.
Has been attributed synergistic effect upon fragrance mixtures (perfume compositions, etc.).
A French patent covers its use as a fragrance-enhancing additive, but experiments seem to confirm that the material is not a universal synergist.
Produced from L-alpha-Glutamic acid, by esterification.