The effect of dose rate on the radiation chemical yield of hydroxyterephthalate (HOTA) in the radiolysis of aerated terephthalate (TA) aqueous solution has been investigated,and the generation of •OH by copper ion catalyzed Fenton reaction has been evaluated with the help of TA. No significant difference in the G (HOTA) was observed at dose rate ranging from 8.2×10,-3, to 1.6Gy s,-1,. The presence of Cu,2+, at concentration less than 1/10 of [TA] lowers the G (HOTA) to 0.53, however G (HOTA) does not change with [Cu,2+,] added. As indicated by the formation of HOTA,the "•OH" generated by the Fenton-type reaction catalyzed by copper ion is different from that generated radiolytic,the former is rather localized and therefore difficult to be scavenged by TA.