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1. any of a class of organic compounds formed by combination of an aldehyde molecule and two alcohol molecules. 2. CH3CH(OC2H5)2, a colorless, volatile liquid used as a solvent and in cosmetics.
ACETAL Acetal is the common name for a family of thermoplastics with the chemical name PolyOxy-Methylene. Acetal is available in a general purpose copolymer grade, a homopolymer version (Delrin Â®), and several filled grades.Acetal provides high strength and stiffness, enhanced dimensional stability, and is easy to machine.cetal is available in a general purpose copolymer grade, a homopolymer version (Delrin Â®), and several filled grades. Acetal provides high strength and stiffness, enhanced dimensional stability, and is easy to machine.