Abstract
Formaldehyde has been the most commonly used for a space biological decontaminating agent because of its efficiency and convenience. Traditional fumigation with formaldehyde may be still effective method, but the use of formaldehyde has been strictly regulated by authorities for some years. Hydrogen peroxide （H₂O₂）has a powerful oxidizability and has become an alternative agent to formaldehyde for biological decontamination. Since the catalyst decomposes H₂O₂ to water and oxygen at the end, it is good for reduction of environmental burdens. Furthermore, four other types of gasses can be decomposed with the catalyst. This is an introduction of catalyst which reacts on multiple type of gasses.
