1862 Proc. Royal Soc. 1860–6211 117Oxy-tere-phthalic acid forms beautiful crystalline salts, which are less soluble than the corresponding terephthalates.
1877 H. WattsDict Chem. IV. 321Oxyterephthalic acid,..is produced..by the action of nitrous acid on oxyterephthalamic acid.