Profile: Hunan Minstrong Technology Co., Ltd specializes in providing catalysts, and carbon products. Hopcalite is a mixture of copper and manganese dioxides used as catalyst to convert carbon monoxide into carbon dioxide when exposed to the oxygen in air. Hopcaliate also is widely used in dealing with ozone (O3), VOC and other industrial waste gas. Our carbon monoxide catalyst filter is a catalyst made up of a certain proportion of active manganese dioxide and copper oxide.