Di- and Tri-chloromethyl ChloroFORMATES

These compounds were prepared by Hentschel in 1887 by the action of chlorine on methyl chloroformate. 

During the war of 1914-18 they were employed as war gases, especially  

The mixture of monochloromethyl chloroformate with dichloromethyl chloroformate, used in 1915 by the Germans under the name of K-Stoff, and later also by the Allies, especially the French, by whom it was called Palite.  

Trichloromethyl chloroformate, used almost exclusively by the Germans, under the name of Perstoff (Meyer). 

The manufacture of these substances was carried out by the formate method or the chloroformate method, as mentioned on p. 99. The method of chlorination in each of these is similar and requires a suitable source of light. Many experiments on this subject have indicated that the Osram watt arc lamp and the mercury vapour lamp are suitable light sources, and the 

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It has been found that while the aliphatic arsines and phenyl carbylamine chloride produce a similar turbidity at high concentration (4%), other substances such as mono-, di- and tri-chloromethyl chloroformates, chloropicrin, benzyl bromide, acrolein, the aromatic arsines, thiodiglycol, etc., do not react. 

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