
A chemical compound that reacts with chlorine-based bleaches to stop the bleaching. Thiosulfate compounds are antichlors.
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http://antoine.frostburg.edu/chem/senese/101/glossary/a.shtml

An antichlor is a substance used to decompose residual hypochlorite or chlorine after chlorine-based bleaching, in order to prevent ongoing reactions with, and therefore damage to, the material that has been bleached. Antichlors include sodium bisulfite, potassium bisulfite, sodium metabisulfite, sodium thiosulfate, and hydrogen peroxide. In the t...
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http://en.wikipedia.org/wiki/Antichlor

• (n.) Any substance (but especially sodium hyposulphite) used in removing the excess of chlorine left in paper pulp or stuffs after bleaching.
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http://thinkexist.com/dictionary/meaning/antichlor/
An'ti·chlor noun [ Prefix
anti- +
chlor ine.]
(Chemistry) Any substance (but especially sodium hyposulphite) used in removing the excess of chlorine left in paper pulp or stuffs after bleaching.
Found on
http://www.encyclo.co.uk/webster/A/94

Antichlor is the name given to any chemical substance, such as sodium hyposulphite, employed to remove the small quantity of chlorine which obstinately adheres to the fibres of the cloth when goods are bleached by means of chlorine.
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http://www.probertencyclopaedia.com/browse/GA.HTM

A chemical compound that reacts with chlorine-based bleaches to stop the bleaching. Thiosulfate compounds are antichlors. See also: Chlorine.
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https://www.encyclo.co.uk/local/20687

any of various substances, esp. sodium thiosulfate, used for removing excess chlorine from paper pulp, textile, fiber, etc., after bleaching.
Found on
https://www.infoplease.com/dictionary/antichlor
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