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phthalic anhydride

noun, Chemistry.
1.
a white, crystalline, slightly water-soluble solid, C 8 H 4 O 3 , used chiefly in the manufacture of dyes, alkyd resins, and plasticizers.
Origin of phthalic anhydride
1850-1855
First recorded in 1850-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for phthalic anhydride
Historical Examples
  • The phthaleïn formed from gallic acid and phthalic anhydride really results from the union of the latter with pyrogallol.

    Coal Raphael Meldola
  • It condenses with phthalic anhydride to form rhodamine, and with succinic anhydride to rhodamine S.

British Dictionary definitions for phthalic anhydride

phthalic anhydride

noun
1.
a white crystalline substance used mainly in producing dyestuffs. Formula: C6H4(CO)2O
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
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phthalic anhydride in Medicine

phthalic anhydride n.
A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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phthalic anhydride in Science
phthalic anhydride  
A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes, resins, plasticizers, and insecticides. Chemical formula: C8H4O3.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Word Value for phthalic

18
19
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