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Mustard Gas

What is sulfur mustard (mustard gas)?
Sulfur mustard is a type of chemical warfare agent. These kinds of agents are called vesicants, or blistering agents. Exposure to sulfur mustard can cause skin blisters and burns as well as irritation to the eyes and lungs.

Sulfur mustard, also called mustard gas, is an oily liquid. It is typically yellow to brown with a slight garlic, onion, or mustard odor (though in its pure form, it is colorless and odorless). Under certain conditions, sulfur mustard can also be a vapor or solid. In its vapor form, sulfur mustard is heavier than air and will settle in low-lying areas.

Where is sulfur mustard found and how is it used?
Sulfur mustard is not found in nature. It is a man-made chemical used as a warfare agent. Today, more than a dozen countries have sulfur mustard in their arsenals. It is no longer produced in the U.S., although stored sulfur mustard is used for laboratory testing of health effects and antidotes. A mandate by the Chemical Weapons Convention requires all stockpiles of chemical agents, including sulfur mustard, to be destroyed worldwide before April 2007.
How might I be exposed to sulfur mustard?
Sulfur mustard is a chemical agent that can be used by terrorists. Sulfur mustard can be released in areas as a liquid or vapor. You are exposed to this substance only when you come into contact with it. You can be exposed to sulfur mustard by touching contaminated surfaces or breathing contaminated air. It can easily pass through clothing and get onto the skin. Accidental releases from military storage or laboratories can also cause exposure.

Sulfur mustard can last from 1-2 days in the environment under average weather conditions and from weeks to months under very cold conditions. Sulfur mustard vapor can also be carried long distances by wind.

How can sulfur mustard affect my health?
Contact with sulfur mustard can cause bodily injury. The extent of injury depends on the amount you are exposed to, how long you are exposed, and how you come in contact.
  • Exposure to sulfur mustard gas is usually not deadly. When sulfur mustard was used during World War I, it killed fewer than 5% of the people who were exposed and got medical care.
  • Exposure to liquid sulfur mustard can cause second- and third-degree skin burns. It can be particularly harmful to sweaty body parts, such as the underarm area. Exposure may also cause skin blisters within a few days. Extensive skin burning can be fatal.
  • Exposure to sulfur mustard can make the eyes burn and eyelids swell, or make a person blink a lot. Extensive eye exposure can cause permanent blindness.
  • Breathing sulfur mustards can cause coughing, bronchitis, and other breathing symptoms. Exposure to very high levels can cause long-term respiratory disease or death.
  • Sulfur mustard may cause cancer in the airways, lungs, skin, and maybe other areas of the body years after exposure. It is not known if sulfur mustard can affect people's ability to reproduce.
What are signs and symptoms of exposure to sulfur mustard?
People may not know right away that they have been exposed to sulfur mustard. Depending on the amount of the exposure, signs and symptoms may take 2-24 hours to appear. Some people may have symptoms sooner.

Specific effects of exposure include:

  • Skin: Redness and itching may occur 2-8 hours after exposure; yellow blistering of affected skin may appear later.
  • Eyes: Irritation, pain, swelling, and tearing may occur within 3-12 hours. A more severe exposure may cause symptoms within 1-2 hours and may also include light sensitivity, severe pain, or blindness (lasting up to 10 days).
  • Respiratory tract: Runny nose, sneezing, hoarseness, bloody nose, sinus pain, shortness of breath, and cough may occur within 12-24 hours of a mild exposure and within 2-4 hours of a severe exposure.
  • Digestive tract: Abdominal pain, diarrhea, fever, nausea, and vomiting may occur.

Showing these signs and symptoms does not necessarily mean that you have been exposed to sulfur mustard. These symptoms can also be caused by other conditions.

What should I do if I'm exposed to sulfur mustard?
Reduce your exposure as soon as possible.
  • Leave the affected area. Immediately leave the area where the sulfur mustard was released. If sulfur mustard is released in an open space, it will spread out rapidly; if it is released within an enclosed space, get fresh air as quickly as you can. Keep in mind that sulfur mustard is heavier than air, so vapors will collect in lower areas.
  • Get the sulfur mustard off your body. If you have direct contact with the chemical, get the sulfur mustard off your body to prevent or reduce injury.
    • Quickly remove any clothing that has liquid sulfur mustard on it.
    • Immediately wash exposed skin and eyes with clean water. Eyes need to be flushed with water for 5-10 minutes. Keep eyes uncovered to allow for drainage. Since affected eyes can become sensitive to light, sunglasses may be worn to protect the eyes.
  • If swallowed, do NOT induce vomiting. Drink milk.
  • Dial 911. Explain what has happened and seek medical attention right away.
What is the medical treatment for people exposed to sulfur mustard?
Supportive medical care is given to victims to minimize the effects of sulfur mustard exposure. The most important factors are to remove the sulfur mustard from the body and flush the eyes with water.
Is there a medical test to determine whether I have been exposed to sulfur mustard?
There is no effective medical test to determine if you have been exposed to sulfur mustard.
Are there any special risks for children?
Children are more vulnerable than adults to the effects of sulfur mustard. Burns may be more severe and blisters may appear sooner in children. Coughing and vomiting have been reported as early symptoms of exposure to sulfur mustard in children. We do not know if exposure causes birth defects or other developmental effects in humans.
What are the effects of sulfur mustard exposure on pets?
Pets exposed to sulfur mustard are likely to experience similar toxic effects as those experienced by humans. If possible, remove the sulfur mustard from your pet(s) with soap and water. Be sure to protect yourself from getting exposed by wearing gloves and protective clothing. Contact either a veterinarian or the ASPCA Animal Poison Control Center (1-888-426-4435).
Is there anything specific that New Yorkers can do to prepare for a possible chemical terrorism event?
Emergency management officials recommend an "all-hazards" approach to emergency preparedness, which means that one plan can be used for several kinds of emergencies. Creating a household disaster plan, assembling an emergency supply kit, and putting together a bag of supplies you can grab on the go (a "go-bag") will provide you with the tools you need for almost any emergency, including a chemical release. Please read at Preparing for a Public Health Emergency: A Guide from the New York City Department of Health and Mental Hygiene for more information.

During any public health emergency, health officials will provide instructions through TV and radio on how best to protect yourself and your loved ones. Were a chemical release to occur in New York City, stay tuned to the news media. Do NOT immediately rush to hospital emergency rooms. You may not be in immediate danger, and hospitals have to treat those who need immediate care. Furthermore, many treatments will be provided in non-hospital settings (emergency clinics) that would be established in multiple locations throughout the five boroughs.

What if fears about terrorism are having a serious impact on my family and work life?
After the events of September 11th, 2001 it is reasonable for individuals to feel anxious about their personal safety. However, if anxiety stops you from doing things that you would normally do, it might be helpful to speak with a professional counselor. Your healthcare provider can make a referral, or you can get help by calling 1-800- LIFENET (1-800-543-3638); 1-877-AYUDESE (1-877-298-3373) for Spanish LIFENET; 1-877-990-8585 for Chinese LIFENET; or 311 and ask for LIFENET.
Additional Information

Last Updated: January 15, 2013