... added catechin, photocatalyst, cold catalyst, active carbon, vitamin C, aromatics, anti-sensitive or catalyzer. It’s used ... efficiency paper filter element, catechin, anti-sensitive, vitamin C, aromatics, active carbon, photocatalyst, cold catalyst, nano ... harmless, no sensitive reaction. Application:1). Central air conditioner, air HFPA purifier, air cleaner, auto cabin, Fragrance machine etc.2). ...