A review, with no references, of the use of sound and ultrasound in the chem. industry, with emphasis on the phys. and mech. effects of ultrasound (especially in mixing), methods of generation of ultrasound, and industrial applications.Typical applications include the production of 1-nitronaphthoquinone (as an intermediate in manufacture of 1-aminoanthraquinone), thermally induced polymer crosslinking, dispersion of TiO2 pigments in paints, stabilization of emulsions, production of SiO2 sols for photomasks, and in ultrasonic water purification