(thing) by CentrX Sun Aug 20 2000 at 23:17:47

Any of three isometric acids, C6H4(COOH)2, especially one (ortho-phthalic acid) obtained by oxidation of naphthalene of xylene and used in the manufacture of dyes, certain synthetic resins, etc.

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(thing) by jafuser Tue Sep 26 2000 at 8:56:31

structural formula of phthalic acid: 


             H

             |

             O

              \ 

      H        C == O

       \      /        

        C == C        O -- H

       /      \      /

 H -- C        C -- C

       \\    //      \\

        C -- C        O

       /      \

      H        H        phthalic acid

                        C8H6O4

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