It has been reported recently that ISIS might be inclined to step up their terror attacks with the use of Mustard Gas. This is a horrible prospect because Mustard Gas is caustic and will burn any flesh that it comes in contact with. As a matter of fact, the substance was so horrible that it was agreed by all civilized societies after World War I, not to ever use it again for warfare.
According to Livescience.com, this is a brief history of Mustard Gas:
"Mustard gas, or sulfur mustard (Cl-CH2CH2)2S, is a chemical agent that causes severe burning of the skin, eyes and respiratory tract. It can be absorbed into the body through inhalation, ingestion or by coming into contact with the skin or eyes.
First used during World War I, the gas is effective at incapacitating its victims en masse. Sulfur mustard is generally colorless in its gaseous state, though it may have a faint yellow or green tint. It's most easily recognized by its trademark "mustardy" odor, though some compare its smell to that of garlic, horseradish or sulfur.
The gas is a vesicant, or blister-agent, causing redness and itching of the skin that results in yellow, pus-filled blisters. Because mustard gas strips away the mucous membranes of the eyes, nose and respiratory tract, victims may also experience irritation of the eyes, temporary blindness, runny nose, cough, shortness of breath and sinus pain. The digestive tract is also affected, resulting in abdominal pain, diarrhea, fever and vomiting."
The problem then is that even if you are wearing a gasmask, this stuff can mess you up in a major way. The best advice you can put to use in dealing with this stuff is to look for ways to ventilate whatever area you are in. You can't let it get on you in any way.