An examination by the Self-Defense Forces had earlier indicated that the shells were flammable and contained yperite, better known as mustard gas, and Lewisite. |
In 2010, the reaction masses left after the disposal of more than 130 tons of yperite were burnt. |
In the pre-war years the production of yperite was prepared at 6 plants in Moscow, Chapaevsk, Stalingrad, Dzerzhinsk, Berezniki and Stalinogorsk. |