... pollution, sterilizing, anti-virus and anti-mildew, release negative oxygen ion 1)Purified airresolve the formaldehyde, benzene, ammonia and other ... household environment, public places, vehicles, medical institutions, education units, air-conditioners etc., can wipe off harmful gas, sterilize, eliminate odour ... 500 mlExecutive standardQB/MD2005001Validity2 years 2-3 nano meter Quantum Photocatalyst