<unk>  or sulfur<unk>  is a chemical compound belonging to a family of cytotoxic and blister agents known as<unk>  agents. The name<unk>  is widely used, but it is technically incorrect: the substance, when dispersed, is often not actually in a vapor, but is instead in the form of a fine mist of liquid droplets.<unk>  has a long history of being used as a blister agent in warfare and is one of the most well-studied of such agents. It can form large blisters on exposed skin and in the lungs, often resulting in prolonged illness ending in death. Sulfur<unk> s are viscous liquids at room temperature and have an odor resembling<unk>  plants, garlic, or horseradish, hence the name. When pure, they are colorless, but when used in impure forms, such as in warfare, they are usually yellow-brown. As a chemical weapon,<unk>  was first used in World War I, and has been used in several armed conflicts since then, including the Iran–Iraq War, resulting in more than 100,000 casualties. Today, sulfur-based and nitrogen-based<unk>  agents are regulated under Schedule 1 of the 1993 Chemical Weapons Convention, as substances with few uses other than in chemical warfare (though since then,<unk>  has been found to be useful in cancer chemotherapy).<unk>  agents could be deployed by means of artillery shells, aerial bombs, rockets, or by spraying from aircraft.
Mustard gas
BoRit Asbestos
Asbestos
Carbon monoxide
Tear gas
Coal tar
Haloalkane
Vinyl chloride