Ice Tracer, a Huck Salt product in 20 lb bags. Ice Tracer is a blend of sodium chloride (salt) and magnesium chloride to help melt and prevent re-freezing of ice. The salt and magnesium chloride blend is safer for concrete and the environment. Safer for sidewalks and plants when compared to rock salt. Each salt crystal is purple in color to help with application and is a visual cue for people when they are walking. Ice Tracer’s bag has a gusseted bottom will help prevent the bag tipping over and spilling contents. Harvested and MADE IN NEVADA!