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Perchloric acid forms an azeotrope with water, consisting of about 72.5% perchloric acid. This form of the acid is stable indefinitely and is commercially available. Such solutions are hygroscopic. Thus, if left open to the air, concentrated perchloric acid dilutes itself by absorbing water from the air.
4.72 Vapor pressure: 0.00007 mmHg ... NFPA 704 (fire diamond) 2. 1. 0. ... under section 108 of the Consumer Product Safety Improvement Act of 2008 (CPSIA).
Selenium is toxic in high concentrations. As sodium selenite, the chronic toxic dose for human beings was described as about 2.4 to 3 milligrams of selenium per day. [7] In 2000, the US Institute of Medicine set the adult Tolerable upper intake levels (UL) for selenium from all sources - food, drinking water and dietary supplements - at 400 μg/day. [8]
International Chemical Safety Card 0837; NIOSH Pocket Guide to Chemical Hazards. "#0634". National Institute for Occupational Safety and Health (NIOSH). "Final Report on Fire Extinguishing Agents for the Period September 1, 1947, to June 30, 1950", Contract No. W44-099eng-507, Purdue Research Foundation, Lafayette, Indiana, July 1950.
Benzotrichloride is classified as an extremely hazardous substance in the United States as defined in Section 302 of the U.S. Emergency Planning and Community Right-to-Know Act (42 U.S.C. 11002), and hence its use is subject to a list of reporting requirements by companies or institutions which synthesize, store or use it in large quantities.
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1904 – Great Fire of Toronto, April 19 fire that destroyed a large section of Downtown Toronto, Canada. 1905 – Watson Street Lodging House fire in Glasgow, Scotland on November 19, killed 39. [5] 1908 – Rhoads Opera House fire, Boyertown, Pennsylvania, killed 170. [6] 1908 – Parker Building, New York City, January 10.