phthalic acid

noun (1)
phthal·ic acid | \ˈtha-lik- \

Definition of phthalic acid 

(Entry 1 of 2)

: any of three isomeric acids C8H6O4 obtained by oxidation of various benzene derivatives

phthalic anhydride

noun (2)

Definition of phthalic anhydride (Entry 2 of 2)

: a crystalline cyclic acid anhydride C8H4O3 used especially in making alkyd resins

First Known Use of phthalic acid

Noun (1)

1857, in the meaning defined above

Noun (2)

1855, in the meaning defined above

History and Etymology for phthalic acid

Noun (1)

International Scientific Vocabulary, short for obsolete naphthalic acid, from naphthalene

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The first known use of phthalic acid was in 1855

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More Definitions for phthalic acid

phthalic acid

noun
phthal·ic acid | \ˌthal-ik- \

Medical Definition of phthalic acid 

: any of three isomeric acids C8H6O4 obtained by oxidation of various benzene derivatives

More from Merriam-Webster on phthalic acid

Britannica.com: Encyclopedia article about phthalic acid

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