Green Cross (chemical warfare)
Green Cross is a World War I chemical warfare pulmonary agent consisting of chloropicrin, phosgene and/or trichloromethyl chloroformate.
Green Cross is also a generic World War I German marking for artillery shells with pulmonary agents. The tip of the projectile with the fuse end painted green and a green cross at the bottom of the cartridge.
Other Green Cross mixtures were based on phosgene and/or diphosgene.
The first use of Green Cross was on May 31 1915 in a German offensive in Ypres. The mixture was chlorine-phosgene, with 95% and 5%.