bleaching powder

bleaching powder

 
noun Chemistry.
a white powder that decomposes on contact with water and has the characteristic odor of gaseous chlorine: regarded, when dry, as a mixed calcium hypochlorite-chloride, used as a commercial bleach for wood pulp, textiles, oils, and soaps, and in laundering as a decolorizer and disinfectant.
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Also called chloride of lime, chlorinated lime, calcium oxychloride.

Origin:
1850–55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Bleaching powder is always a great word to know.
So is reagent. Does it mean:
a substance that, because of the reactions it causes, is used in analysis and synthesis
pertaining to compounds that are not hydrocarbons or their derivatives
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Collins
World English Dictionary
bleaching powder
 
—n
chloride of lime, Also called: chlorinated lime a white powder with the odour of chlorine, consisting of chlorinated calcium hydroxide with an approximate formula CaCl(OCl).4H2O. It is used in solution as a bleaching agent and disinfectant

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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