Most riot-control agents would be classified as irritants under DOT hazard class 6.1.NoInformation is available on NFPA 704 designations for riot-control agents. UN four-digit identification numbers are listed for several types of tear gas and containers. Grenades and tear gas candles are poison 6.1 and flammable solids. Tear gas devices are assigned the number 1700; devices and the remaining types of tear gas are listed as 1693. Because riot-control agents are particulate in nature, exposure will require decontamination of victims and responders. Bleach solutions should not be used for decontamination, because they will make the symptoms and effects of the agents worse. Plain soap and water from hose lines. Clothing must be removed. This process will remove the majority of the agent particles off of the person.