Pulmonary agent
Encyclopedia
A pulmonary agent is a chemical weapon agent designed to impede a victim's ability to breathe
Respiratory system
The respiratory system is the anatomical system of an organism that introduces respiratory gases to the interior and performs gas exchange. In humans and other mammals, the anatomical features of the respiratory system include airways, lungs, and the respiratory muscles...

. They operate by causing a build-up of fluids in the lungs which then leads to
suffocation
Asphyxia
Asphyxia or asphyxiation is a condition of severely deficient supply of oxygen to the body that arises from being unable to breathe normally. An example of asphyxia is choking. Asphyxia causes generalized hypoxia, which primarily affects the tissues and organs...

. Exposure to the eyes and skin tend to be corrosive, causing blurred vision and severe deep burns. Inhalation of these agents cause burning the throat, coughing, vomiting, headache, pain in chest, tightness in chest, and may lead to respiratory and circulatory failure.

Examples of pulmonary agents include:
  • Chlorine gas
    Chlorine
    Chlorine is the chemical element with atomic number 17 and symbol Cl. It is the second lightest halogen, found in the periodic table in group 17. The element forms diatomic molecules under standard conditions, called dichlorine...

  • Chloropicrin
    Chloropicrin
    Chloropicrin, also known as PS, is a chemical compound with the structural formula Cl3CNO2. This colourless highly toxic liquid was once used in chemical warfare and is currently used as a fumigant and nematocide.-History:...

     (PS)
  • Diphosgene
    Diphosgene
    Diphosgene is a chemical compound with the formula ClCO2CCl3. This colorless liquid is a valuable reagent in the synthesis of organic compounds...

     (DP)
  • Phosgene
    Phosgene
    Phosgene is the chemical compound with the formula COCl2. This colorless gas gained infamy as a chemical weapon during World War I. It is also a valued industrial reagent and building block in synthesis of pharmaceuticals and other organic compounds. In low concentrations, its odor resembles...

     (CG)


Phosgene is the most dangerous chemical of Pulmonary agents. It is a colorless gas under ordinary conditions. It has a vapor density 3.4 times greater than that of air allowing it to remain low in the air for long periods of times. Phosgene leads to massive pulmonary edema, which reaches maximum symptoms in 12 hours after exposure followed by death within 24-48 hours.

Chlorine is an element used in industry. It is one of the most commonly manufactured chemicals in the United States. It is used to make pesticides, rubber, and solvents. It is also used in drinking water and swimming pools to kill bacteria. The extent of poisoning caused by chlorine depends on the amount of chlorine a person is exposed to.

History

The first modern history use of a pulmonary agent was by the British and The union in the Crimean and Civil War. They simply filled shells with chlorine gas and fired. The first major use of these agents came on April 22, 1915 at the Second Battle of Ypres
Second Battle of Ypres
The Second Battle of Ypres was the first time Germany used poison gas on a large scale on the Western Front in the First World War and the first time a former colonial force pushed back a major European power on European soil, which occurred in the battle of St...

in Belgium. The Germans opened up 168 tons of chlorine gas on the French, Canadian and British troops which created a wind-borne cloud of chemical gas that opened up a breach in the lines. However, the Germans were not prepared to exploit the opening. In 1917 the Germans also introduced the agent phosgene. By then both sides had mastered the techniques of new choking agents such as diphosgene, chloropicrin, and perfluoroisoboxylene which allowed numerous attacks to be made. By the end of World War I phosgene was responsible for roughly 80% of all deaths related to chemical attacks.
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