Product description: Calcium Chloride Content: 74%/77%/90%/94% Appearance: powder, flake, granule, pellet Features: Melts down to -25oF/-32℃ Begins melting ice on contact Exothermic reaction generates heat to improve melting performance Safe when used as directed on air-entrained cold-weather concrete that is at least one year old No powdery residue Snow melts the moment you lay it down due to a powerful self-initiating chemical reaction that excels even at temperatures of -32℃