Diisobutyl phthalate is essentially odorless — a clear, oily liquid with at most a faint, slightly sweet plasticky background note. It is used historically as a fixative/diluent rather than as an odorant, giving no meaningful olfactory contribution on its own.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 216.
Colorless oily liquid
Almost insoluble in water, soluble in alcohol and oils
Practically odorless when pure
Has been used as a solvent-blender-diluent
Produced from iso-Butanol and Phthalic anhydride or Phthalic acid