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in 2007, when MDL became part of Symyx, which is now part of Accelrys. The Chemical Name, Synonym and Trade Name Index can be used to search for chemical pages.
This index also includes the primary chemical names for all of the chemicals in the (milligrams of vapor or gas per cubic meter of contaminated air) at 25°C and 1 atmosphere for chemicals with exposure limits expressed in ppm.
The CAS number, in the format xxx-xx-x, is unique for each chemical and allows efficient searching on computerized data bases.The chemicals or substances contained in this revision include all substances for which the National Institute for Occupational Safety and Health (NIOSH) has recommended exposure limits (RELs) and those with permissible exposure limits (PELs) as found in the Occupational Safety and Health Administration (OSHA) General Industry Air Contaminants Standard (.1000).In 1974, NIOSH (which is responsible for recommending health and safety standards) joined OSHA (whose jurisdictions include promulgation and enforcement activities) in developing a series of occupational health standards for substances with existing PELs.Current Intelligence Bulletins (CIBs) are issued to disseminate new scientific information about occupational hazards.A CIB may draw attention to a formerly unrecognized hazard, report new data on a known hazard, or present information on hazard control.