Gas Cylinder Safety Gas cylinders require special safety precautions. Know what the chemical is inside the cylinder in order to work with it safely. Be aware of the mechanical hazards associated with keeping the chemical under pressure in a metal cylinder. Chemicals contained in gas cylinders may be flammable, corrosive, poisonous, inert, or a combination of any of these. Read the Safety Data Sheet (SDS) for the chemicals in each cylinder you store and use. Understand the concentration of the chemical, the amount, and the storage pressure to work with it safely. The SDS should provide you information on proper storage and segregation...