To: xray who wrote (1508 ) 9/1/1998 7:53:00 PM From: Ginco Read Replies (1) | Respond to of 2444
Methylene chloride is a widely used chemical solvent with a diverse number of applications. It was introduced as a replacement for more flammable solvents over 60 years ago. Methylene chloride is commonly used in paint removers and industrial adhesive formulations. It also is employed in the production of flexible urethane foams, pharmaceutical products, and plastics, as a cleaning agent for fabricated metal parts, and as an extraction solvent. Methylene chloride is a member of a family of saturated aliphatic halogenated compounds. It is a colorless, volatile liquid, completely miscible with a variety of other solvents. It is produced in the United States by The Dow Chemical Company and Vulcan Materials Company. Total U.S. demand for the chemical in 1996 was estimated at about 285 million pounds (129,000 metric tons) of which about 20 million pounds (9000 metric tons) was imported. About 130 million pounds (59,000 metric tons) were exported. Uses Methylene chloride is a highly desirable chemical for many applications because of the following characteristics: Its aggressive solvency makes it an ideal paint remover that does not harm wood in the removal process. It has no flash point under normal use conditions and can be used to reduce the flammability of other substances, decreasing the chance of in-plant fire or explosion. It is an effective vapor pressure depressant in aerosols. It does not contribute significantly to atmospheric pollution through the formation of smog, to the depletion of the stratospheric ozone layer, or to global warming. For 1996, the use of methylene chloride in its various applications are estimated to be: paint stripping 30% adhesives 16% aerosols & coating 11% foam manufacture 10% pharamceuticals 10% chemical processing 9% metal cleaning 8% miscellaneous 6% PAINT STRIPPING Methylene chloride is the active ingredient in many formulations of paint removers including industrial paint and commercial furniture strippers, home paint removers, and products used for aircraft maintenance. The chemical has a unique ability to penetrate, blister, and lift a wide variety of paint coatings. Formulations of the chemical are used extensively in both flow-over and immersion (dip) tanks in furniture refinishing operations. For the maintenance of military and commercial aircraft, a methylene chloride-based product is often required to inspect the surface for damage.hsia.org hsia.org