The EU security office in Egypt has warned all their personnel to stay away from Tahrir because of the type of gas. An email that was sent to them:

Subject: A good reason to avoid Tahrir square


Importance: High

Information to all staff (from open sources)The tear gas used in the past days on the Tahir Square. The text immediately below is from a public source, the explanation came from one of most respected CBRN officer in Europe.

CAIRO:

The tear gas being employed by the Egyptian military and police in the past 48 hours, beyond being expired for at least five years, according to canisters obtained by Bikyamasr.com, cause severe pulmonary damage, as well as causing damage to the heart and liver. It is also reported to increase the risk of miscarriages, according to international studies of the substance, known as CR gas.A lethal does can be inhaled within minutes if in a poorly ventilated area.

According to the United States Army Center for Health Promotion and Preventive Medicine, CR emits “very toxic fumes” when heated to decomposition, and at specified concentrations CR gas is an immediate danger to life and health. The report also stated that those exposed to CR gas should “seek medical attention immediately.”

In large doses, human tissues have also revealed that cyanide levels in the body are discovered. It can also “melt” one’s skin if sweat on the body comes into contact with the substance.

Egyptian demonstrators have been exposed at high levels over the past two days, with many calling the use of the gas a “crime against humanity” as it has resulted in severe injuries due to its indiscriminate usage by both police and military forces.Under the Paris Convention on Chemical Warfare of 1993, CR Gas was officially listed as a restricted substance and eventually was banned, but it has not stopped governments across the world from deploying the gas on civilians. The United States, Sri Lanka, Israel and others including Egypt, have continued to use the gas on its people.At a field hospital along Mohamed Mahmoud street on Sunday evening, the military slammed the area with the substance, causing scores of Egyptians to run in panic as clouds of tear gas billowed forth. A few individuals succumbed to the extraordinary amount of gas, coughing and vomiting.

“I can’t believe this is happening,” said one doctor to Bikyamasr.com. “This is causing people to pass out, vomit and cough blood. It isn’t safe.”

The company producing the gas being used in Egypt, Combined Tactical Systems of Jamestown, Pennsylvania in the United States, refused to respond to Bikyamasr.com requests for information pertaining to expired canisters and its effects on people.But on the ground in Tahrir and the surrounding streets, it is clear that the tear gas is having massive effects on demonstrators.

“It is wrong, horrific and scary to think the military has purchased so many they just shoot them like they have an endless supply from the US,” said one demonstrator, using a tissue to wipe his blood-shot eyes.

The substance :CR gas ( dibenzoxazepine ) was developed in the sixties as a riot control instrument .It is a light yellow substance smelling as pepper.Effect of CR is six times to ten times stronger than the more usual Tear gas.CR can suppress on surfaces ( especially porous ) and can stay there for approximately sixty daysEffect:
CR causes intense skin irritation especially in moist areas on the body, contractions of the eyelid ( possible causes temporarily blindness, coughing , yearn for breath and panicking.
At certain concentration causes immediate incapacitation. It is most probably carcinogen and can be lethal at high concentrations. In an area badly ventilated , someone could inhale a lethal doses. Death will be caused by suffocation and moisture in the respiratory organs.

Treatment:While normal teargas can by decontaminated with large amounts of water, the use of water could increase the effects of CR. The contaminated skin can be extremely painfull after contact with water until 48 hours later. Contaminated clothes have to be removed.

Advise: Exposure needs to be prevented as much as possible. If one has to be in an area where one is to be exposed, or could be exposed : the skin needs to be covered as good as possible. Avoid places where CR has been used, because the effect of CR will be noticeable long after use. The only proper protection for breathing is a gasmask ( filter bus respirator ) with aerosol filter. Exposure to the skin ( regardless the remark about water ) , clean the skin by severely washing with water and soap. Not just pouring water but scrubbing with soap, because CR does not dissolve in water.

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