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  2. National Institute for Occupational Safety and Health

    en.wikipedia.org/wiki/National_Institute_for...

    NIOSH was created by the Occupational Safety and Health Act of 1970 and began operating in May 1971. It was originally part of the Health Services and Mental Health Administration, and was transferred into what was then called the Center for Disease Control (CDC) in 1973. NIOSH's initial headquarters were located in Rockville, Maryland.

  3. Recommended exposure limit - Wikipedia

    en.wikipedia.org/wiki/Recommended_exposure_limit

    All RELs are located in the NIOSH Pocket Guide to Chemical Hazards, along with other key data for 677 chemical or substance groupings. The Pocket Guide is a source of general industrial hygiene information for workers, employers, and occupational health professionals. NIOSH recommendations are also published in a variety of documents, including:

  4. NIOSH air filtration rating - Wikipedia

    en.wikipedia.org/wiki/NIOSH_air_filtration_rating

    A TB guide, published by NIOSH in 1999, describes 13 combinations of contaminants with unique color markings. The definitive guide from ANSI, who, since the passage of 42 CFR 84 in 1995, has published a 2001 revision of K13.1-1973, named Z88.7-2001, describes 14 combinations of contaminants with unique color markings, based on 13 out of the 28 ...

  5. Phosgene - Wikipedia

    en.wikipedia.org/wiki/Phosgene

    Structure and basic properties. Phosgene is a planar molecule as predicted by VSEPR theory. The C=O distance is 1.18 Å, the C−Cl distance is 1.74 Å and the Cl−C−Cl angle is 111.8°. [9] Phosgene is a carbon oxohalide and it can be considered one of the simplest acyl chlorides, being formally derived from carbonic acid .

  6. Propionitrile - Wikipedia

    en.wikipedia.org/wiki/Propionitrile

    Propionitrile, also known as ethyl cyanide and propanenitrile, is an organic compound with the formula CH 3 CH 2 CN. It is a simple aliphatic nitrile. The compound is a colourless, water-soluble liquid. It is used as a solvent and a precursor to other organic compounds.

  7. Sodium metabisulfite - Wikipedia

    en.wikipedia.org/wiki/Sodium_metabisulfite

    Sodium metabisulfite or sodium pyrosulfite (IUPAC spelling; Br. E. sodium metabisulphite or sodium pyrosulphite) is an inorganic compound of chemical formula Na 2 S 2 O 5. The substance is sometimes referred to as disodium metabisulfite. It is used as a disinfectant, antioxidant, and preservative agent. [2]