Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. It is the anhydride of phthalic acid. Phthalic anhydride is a principal commercial form of phthalic acid. It was the first anhydride of a dicarboxylic acid to be used commercially.
![](https://pammvi.com/wp-content/uploads/2020/06/icon_technic.jpg)
Helping you overcome your technolgy challenges