definitions

bleaching powder

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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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Nearby words

bleacher, bleacherite, bleachers, bleachery, bleaching, bleaching powder, bleak, bleak house, bleakly, blear, blearedness

Origin of bleaching powder

First recorded in 1850–55
Also called chloride of lime, chlorinated lime, calcium oxychloride.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for bleaching powder

British Dictionary definitions for bleaching powder

bleaching powder

noun

a white powder with the odour of chlorine, consisting of chlorinated calcium hydroxide with an approximate formula CaCl(OCl).4H 2 O. It is used in solution as a bleaching agent and disinfectantAlso called: chloride of lime, chlorinated lime
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012