Loyal Ultrasound Transmission Gel for Diagnostic and Therapeutic Purpose is water-soluble. Non-greasy and will not irritate tissues or injure the ultrasound applicator or electrodes. It spreads easily and evenly and is an efficient coupling medium for ultrasound transmission. Better sound transmission, distinctive image display, no toxic and irritant effect, no damage and corrosion to the ultrasound probe. Chemical Composition: Polymer, humectants, water, approved food color, perfume, and preservatives.