C-Stoff, K-Stoff, Monochloromethylchloroformate
C-Stoff when used as fill for trench mortars rounds and bombs and K-Stoff when used as fill for projectile. This compound is a mild lachrymator and has a low volatility. It hydrolyzes easily into formaldehyde, carbonic acid and hypochloric acid. A concentration of 1.0 milligrams per liter is lethal if the individuals is exposed for 30 minutes or longer.