"World Standard for Medical Ultrasound Transmission, AQUASONIC 100 is the most widely used gel for diagnostic and therapeutic medical ultrasound. Recommended for all procedures where a viscous gel is required. Features : - Acoustically correct for the broad range of frequencies used - Completely aqueous, will not stain clothing or damage transducers - Unique ""can't be copied"" formula is hypoallergenic, bacteriostatic, non-sensitizing and non-irritating - No formaldehyde - Not a spermicide - Used and recommended by leading manufacturers of medical ultrasound equipment worldwide ".