ABSTRACT
Chemical weapons, commonly called poisonous gas, are extremely toxic so it is absolutely necessary to filter out the gas before one breathes it in. The most important protective agent, of course, is a gas mask to first catch the poisonous gas, then allow the person to breathe the filtered air. Modern gas masks are made in such a way that you can talk and communicate while wearing the mask. In the Tokyo subway attack in 1995, a large number of the victims exposed to sarin were rushed to different hospitals in Tokyo. Nuclear, biological, and chemical (NBC) laboratories require a special design for the safety of the people engaged in handling warfare agents. This is especially true for biological weapons research. Spiez Laboratory were making a number of poisonous gases including the nerve gas sarin. Because a standard compound is essential for identifying unknown poisonous gases, this laboratory was asked by the United Nations to make various chemical agents.
