Chemsorb MultiGard 3500 series of adsorbents are high-grade impregnated activated carbons specifically designed for use in home air purifiers. Based upon a high activity coconut-shell activated carbon, this material exhibits the superior adsorption capacities for a broad spectrum of gases and vapors, including organic vapors, acid gases, ammonia, amines and aldehydes. Chemsorb MultiGard 3500 series adsorbents are ammonia-free, virtually dust-free and contain no heavy metals such as copper, lead, mercury, nickel or chromium