Phosgene - Introduction, Products, Patents, Process, Study, Company Profiles, Reports

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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 freshly cut hay or grass. Phosgene was first produced by John Davy (inventor of the ‘Davy Lamp’) at the start of the 19 th century. The chemical was named by combining the Greek words ‘phos’ (meaning light) and genesis (birth), as Davy used sunlight to produce the chemical from carbon monoxide and chlorine. Phosgene is produced by passing purified carbon monoxide and chlorine gas through a bed of porous activated carbon, which serves as a catalyst. Phosgene may also be produced during testing for leaks of older-style refrigerant gasses. The great majority of phosgene is used in the production of isocyanates, the most important being toluene diisocyanate (TDI) and methylene diphenyl diisocyanate (MDI). These isocyanates are precursors to polyurethanes. Phosgene was used during World War I as a choking (pulmonary) agent. In the research laboratory phosgene still finds limited use in organic synthesis. A variety of substitutes have been developed, notably trichloromethyl chloroformate (“diphosgene”), which is a liquid at room temperature, and bis(trichloromethyl) carbonate (“triphosgene”), a crystalline substance. Phosgene is an insidious poison as the odor may not be noticed and symptoms may be slow to appear. Phosgene can be detected at 0.4 ppm, which is four times the Threshold Limit Value. Its high toxicity arises from the action of the phosgene on the proteins in the pulmonary alveoli, which are the site of gas exchange: their damage disrupts the blood-air barrier, causing suffocation. The primary use of phosgene is in the production of toluene diisocyanate (TDI), a precursor of the polyurethane resins used to make foams, elastomers, and coatings. A rapidly growing use of phosgene is in the manufacture of polymethylene polyphenylisocyanate (PMPPI), which is used in the production of rigid polyurethane foams. The potential for phosgene generation by chlorocarbon decomposition exists at chlorocarbon producing facilities, metallurgical operations, drycleaning and degreasing facilities, certain types of industrial fires, and wherever solvents contact heat or ultraviolet light.	Introduction Chemical Information The facts on Phosgene Phosgene Facts About Phosgene Chemical Terrorism Fact Sheet Phosgene - Intro MSDS Nonflammable Gas Mixture Phosgene Carbonyl Chloride Phosgene - Msds Carbon oxychloride Chloroformyl chloride Products Chemlogic Dosimeter Badges for Phosgene from DOD Phosgene Triphosgene Company Profiles Company from Delhi Company from Gujarat Company from New Jersey Company from New York Another Company from New York Company from USA Company from Tokyo Guidelines Phosgene Public Handout Acute Exposure Guideline Levels for Selected Airborne Chemicals Guidelines for Phosgene Gas Usage in Laboratories Process Manufacturing Process Phosgene Production Production and Uses Trends in processing and manufacturing Patents Phosgene process Phosgene manufacture Method for hydrolyzing phosgene Process for destroying phosgene Phosgene removal process Method for producing phosgene	Reports Company's Annual Report BAYER further increases Phosgene Production Phosgene Gas Chemical leak at China factory 'poisons workers The formation of Phosgene SNPE boosts phosgene unit Phosgene Toxicity HPA Compendium of Chemical Hazards Phosgene Toxicity Public Information Exposure to Phosgene in Pregnancy Toxicology review of Phosgene Study An ab initio study on the phosgene–water complex Gas chromatographic determination of phosgene and dichloroacetylene in air Estimation of LCt50 of Phosgene in Sheep Evaluation of NBC Canisters against Phosgene a Chemical Warfare Agent Global phosgene observations from the Atmospheric Chemistry Experiment (ACE) mission A Novel Cross-Flow Microreactor for Kinetic Studies of Catalytic Processes Market and Applications Phosgene Application Phosgene Uses From Green to Sustainable Industrial Chemistry Chemical Profile : Phosgene Phosgene Industry - Use Consultants Company from Chennai Company from New York Another Company from New York Company from Washington Consultancy Services Order the CD ROM Today
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