Per-Stoff, British Diphosgene, trichlormethylchloroformate
Green Cross or trichlormethylchloroformate (Per-Stoff or British Diphosgene). Per Stoff is converted to phosgene (D-Stoff) in the body. It affects the body in the same physiological actions as phosgene (D-Stoff). It is a lung injurant and lachrymatory agent, similar to phosgene but more persistent.