England received 900 tons of our chlorpicrin and 368 tons of American phosgene.
A similar method was used for filling shell with chlorpicrin, except that refrigeration was unnecessary.
This plant was rated at 12½ tons of chlorpicrin a day, but reached a production as high as 31 tons on one day.
With the exception of chlorine, chlorpicrin was the first war gas to be manufactured on a large scale in this country.
Chlorpicrin is made by the reaction between picric acid and chlorine.
