Description Harvard Chemical Research Pronto is a non-built liquid laundry detergent which is designed to be equally effective in hot or cold water. This detergent is formulated only for multi-component automatic dispensing systems where the toughest, most troublesome laundry problems exist. This product contains fast-acting cleaning agents and is effective on natural and synthetic fibers. Highly concentrated for use in hotels, motels, schools, hospitals, and nursing homes. SDS