31. These included chlorine and phosgene gas. 32. Both chloride radicals in phosgene can undergo reactions analogous to the preceding reactions of acyl halides. 33. Phosgene is used a reactant in the production of polycarbonate polymers, among other industrial applications.34. Among the best known toxic gases are carbon monoxide, chlorine, nitrogen dioxide and phosgene . 35. In contrast to phosgene , carbonyl bromide cannot be produced efficiently from carbon monoxide and bromine. 36. It can be made by reacting phosgene with ethanol, producing hydrogen chloride as a byproduct. 37. The clinical evidence suggested that the gas cloud contained a low proportion of phosgene to chlorine. 38. Dimethylcarbamoyl chloride is also formed ( together with methyl chloride ) when reacting phosgene with trimethylamine. 39. Another chemical believed present is phosgene , which also was used as a poison gas in warfare. 40. Earlier Chinese reports said they held phosgene , a choking agent used widely in World War I.
