Phosgene

Phosgene
Phosgene is the chemical compound with the formula COCl2. It is a colorless gas which gained importance as a chemical weapon during World War I.Phosgene was synthesized by the British chemist John Davy in 1812 by exposing a mixture of carbon monoxide and chlorine to sunlight.

In low concentrations, its odor resembles freshly cut hay or grass.

It is also an industrial reagent in synthesis of pharmaceuticals and other organic compounds. In addition to its industrial production, small amounts occur naturally from the breakdown and the combustion of organochlorine compounds, such as those used in refrigeration systems.Phosgene is produced by passing purified carbon monoxide and chlorine gas through a bed of porous activated carbon, which serves as a catalyst.

Upon ultraviolet (UV) radiation in the presence of oxygen, chloroform slowly converts into phosgene. To suppress this photodegradation, chloroform is often stored in brown-tinted glass containers.

The great majority of phosgene is used in the production of isocyanates, The isocyanates are precursors to polyurethanes.

Significant amounts are also used in the production of polycarbonates. Polycarbonates are an important class of engineering thermoplastic found, for example, in lenses in eye glasses.

Phosgene is an insidious poison as the odor may not be noticed and symptoms may be slow to appear.  Its high toxicity arises from the action of the phosgene on the proteins in the pulmonary alveoli, which are the site of gas exchange. The damage to the alveoli disrupts the blood-air barrier, causing suffocation.Sodium bicarbonate may be used to neutralise liquid spills of phosgene. Gaseous spills may be neutraised with ammonia.
Following the extensive use of phosgene gas in combat during World War I, it was stockpiled by various countries as part of their secret chemical weapons programs.Phosgene was frequently used by the Imperial Japanese Army against the Chinese during the Second Sino-Japanese War.
Chemical Weapons
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This entry was posted in Diseases & Conditions, Medical Tidbits and tagged , by Manbir & Gurpreet. Bookmark the permalink.

About Manbir & Gurpreet

Gurpreet Kaur’s journey in this world .... Gurpreet Kaur was a Musician. She was a singer and a composer of music. Her interest was composing and singing Gurbani Shabads in Indian Classical style. She sang Shabads in All the Raags mentioned in Sri Guru Granth Sahib Ji. She also taught Gurmat Sangeet at Gurmat Gian Missionary College, Jawadi, Ludhiana. Elder child to Pushpinder Kaur and Dr. Brig. Harminder Singh, was born in Amritsar on 13th Jan 1962. She attended various convent schools as a child because her father would get frequent Army postings as a dental surgeon. She graduated with Music Honors from Govt. College for Women, Chandigarh. Music was her hobby and she composed and sang Raag based Gurbani Shabads. Doing Kirtan was part of growing up nurtured by her parents. She learned music from her father Dr. Brigadier Harminder Singh who was a dental surgeon in Indian Army and a very good singer himself. Gurpreet’s Bhua (father’s sister), Ajit Kaur retied as a Head of Department of Music from Govt. College for Women Ludhiana, and was a renounced Punjabi singer of her time. Gurpreet Kaur also learned nuances of Indian Classical Music from Pandita Sharma. She was a mother of three children, and a grandmother. Her daughter Keerat Kaur is a Computer Engineer. Her two sons Gurkeerat Singh and Jaskeerat Singh are doctors in USA. Her daughter Keerat Kaur too was part of her group ~ Gurmat Gian Group. Gurpreet Kaur left this world at the age of 54yrs on 12th Sept 2016 in Baltimore USA. She had recorded around 25 cds of Gurbani Keertan. 'Raag Ratan' Album (6 CDs) is a Compilation of Shabads in All the 31 Sudh Raags of Sri Guru Granth Sahib Ji. 'Gauri Sagar' Album (3 CDs) is a Compilation of All forms of Raag Gauri in Sri Guru Granth Sahib Ji. 'Nanak Ki Malhaar' ~ ((3 CDs) is an album of Raag Malhar Shabads in various forms of Malhar. 'Gur Parsaad Basant Bana' ~ (3 CDs) is an album of Shabads in Raag Basant sung in various forms of Raag Basant. Har Ki Vadeyai Sarni Aayea Sewa Priya Kee Preet Piyaree Mohan Ghar Aavho Karo Jodariya Mo Kao Taar Le Raama Taar Le Tere Kavan Kavan Gun Keh Keh Gawan Mera Baid Guru Govinda Saajanrraa Mera Saajanrraa

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