Dictionary![]() ![]() dibu'tyl phthal'atePronunciation: (thal'āt, fthal'-), [key] Chem. a colorless oily liquid, C16H22O4, insoluble in water, used as a solvent, insect repellent, and plasticizer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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