The Poison laboratory of the Soviet secret services, also known as Laboratory 1, Laboratory 12 and “The Chamber”, was a covert poison research and development facility of the Soviet secret police agencies. The Soviets tested a number of deadly poisons on prisoners from the Gulag (”enemies of the people”), including mustard gas, ricin, digitoxin and many others. The goal of the experiments was to find a tasteless, odorless chemical that could not be detected post mortem. Candidate poisons were given to the victims, with a meal or drink, as “medication”.
Finally, a preparation with the desired properties called C-2 was developed. According to witness testimonies, the victim changed physically, became shorter, weakened quickly, became calm and silent and died within fifteen minutes. Mairanovsky brought to the laboratory people of varied physical condition and ages in order to have a more complete picture about the action of each poison.