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or paradichlorobenzene

[par-uh-dahy-klawr-uh-ben-zeen, -ben-zeen, -klohr-] /ˌpær ə daɪˌklɔr əˈbɛn zin, -bɛnˈzin, -ˌkloʊr-/
noun, Chemistry.
a white, crystalline, volatile, water-insoluble solid, C 6 H 4 Cl 2 , of the benzene series, having a penetrating odor: used chiefly as a moth repellent.
Also called PDB, para.
Compare dichlorobenzene.
Origin of para-dichlorobenzene
First recorded in 1875-80; para-1 + di-1 + chloro-2 + benzene Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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paradichlorobenzene in Science
A white crystalline compound used as a germicide and an insecticide. Chemical formula: C6H4Cl2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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