• synonyms


[klawr-uh-meen, klohr-, klaw-ram-een, kloh-]
  1. an unstable, colorless liquid, NH2Cl, with a pungent odor, derived from ammonia.
  2. any of a class of compounds obtained by replacing a hydrogen atom of an =NH or −NH2 group with chlorine.
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Origin of chloramine

First recorded in 1890–95; chlor-2 + amine
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for chloramine

Historical Examples

  • Further experimental work showed that the increase was due to the formation of chloramine.

    Chlorination of Water

    Joseph Race

  • The marked activity of chloramine as a chlorinating agent could be predicated from its heat of formation, which is 8,230 calories.

British Dictionary definitions for chloramine


  1. an unstable colourless liquid with a pungent odour, made by the reaction of sodium hypochlorite and ammonia. Formula: NH 2 Cl
  2. any compound produced by replacing hydrogen atoms in an azo or amine group with chlorine atoms
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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

chloramine in Science


  1. One of three bactericidal compounds that form when chlorine and ammonia react in water. Chloramines are used to purify drinking water, since they are more stable than chlorine and produce fewer harmful by-products.
  2. Any of various organic compounds containing a chlorine atom attached to a nitrogen atom, especially one of three sodium salts that are used as antiseptics and germicides. The most widely used is called chloramine-T.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.