Yes, water. Phosgene reacts aggressively with water and hydrolizes in less than a tenth of a second. It doesn't necessarily dissolve readily, but any surface t

Yes, water. Phosgene reacts aggressively with water and hydrolizes in less than a tenth of a second. It doesn't necessarily dissolve readily, but any surface that gets hosed down (or chunk of atmosphere that gets sprayed) will generally be phosgene-free.