Not that I think this is the place for a chemical weapons class, but:
Mustard gas IS NOT Chlorine/Chloramine gas. Chlorine and ammonia make chloramine gas, governments made mustard gas as a chemical weapon (as well as chlorine gas weapons...NOT chloramine gas).
Mustard "gas",C4H8Cl2S is irritating and deadly chemical weapon developed at the begining of the century and first used in 1917. This sticky, amber-black substanct is soluable in some environments but is only slightly soluable in water making it hard to wash off. Its odor has been described as freshly cut hay, horseradish, or garlic, hence, "mustard gas".
When an individual comes in contact with mustard gas, the skin may blister and reddin; become sore, especially in areas with a lot of sweat glands are located. The eyes will burn and could be damaged if exposed for too long. If a person inhales this chemical as a mist, the blisters will form in the lungs, causing a number long and short term symptoms. In cases of extreem exposure, mustard gas is fatal. It has now been classified as a carcinogen Symptoms usually begin to take effect 4-24 hours after initial contact. The long term effects on a individual may include sensitization, cronic lung impairment, cough shortness of breath, chest pain, cancer of the mouth, throat, respitory tract, and skin. It has been linked to causing Leukemia and Birth defects.
" The skin of victims of mustard gas blistered, the eyes became very sore and they began to vomit. Mustard gas caused internal and external bleeding and attacked the bronchial tubes, stripping off the mucous membrane. This was extremely painful and most soldiers had to be strapped to their beds. It usually took a person four or five weeks to die of mustard gas poisoning. One nurse, Vera Brittain, wrote: "I wish those people who talk about going on with this war whatever it costs could see the soldiers suffering from mustard gas poisoning. Great mustard-coloured blisters, blind eyes, all sticky and stuck together, always fighting for breath, with voices a mere whisper, saying that their throats are closing and they know they will choke."
Germany first used chlorine gas cylinders in April 1915 against the French Army at Ypres. French soldiers reported seeing yellow-green clouds drifting slowly towards the Allied trenches. They also noticed its distinctive smell which was like a mixture of pineapple and pepper.
Chlorine gas destroyed the respiratory organs of its victims and this led to a slow death by asphyxiation. (Specifically pulmonary edema (drowning in your own fluids))
British Gas Casualties: 1914-18 / Deaths / Non-Fatal
Chlorine / 1,976 / 164,457
Mustard Gas / 4,086 / 16,526