orthophthalic acid

orthophthalic acid

[awr-thuh-thal-ik, -thuhf-thal-]
noun Chemistry.
See under phthalic acid ( def 1 ).

Origin:
ortho- + phthalic acid

Dictionary.com Unabridged

phthalic acid

noun
1.
Chemistry. any of three isomeric acids having the formula C 8 H 6 O 4 , especially the ortho isomer (orthophthalic acid) a colorless, crystalline, slightly water-soluble solid used chiefly in the manufacture of dyes, medicine, and perfume.

Origin:
1855–60

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World English Dictionary
phthalic acid (ˈθælɪk, ˈfθæl-)
 
n
a soluble colourless crystalline acid used in the synthesis of dyes and perfumes; 1,2-benzenedicarboxylic acid. Formula: C6H4(COOH)2
 
[C19 phthalic, from phthal- (see phthalein) +-ic]

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American Heritage
Medical Dictionary

phthalic acid n.
A colorless crystalline organic acid prepared from naphthalene and used in the synthesis of dyes and other organic compounds.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
phthalic acid   (thāl'ĭk, fthāl'-)  Pronunciation Key 
A colorless, crystalline organic acid prepared from naphthalene and used in the synthesis of dyes, perfumes, and other organic compounds. Chemical formula: C8H6O4.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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