Dioctyl Phthalate Price in China Rises 3.1% to USD 1,457/tonne

Dioctyl phthalate in China was quoted at USD 1,457/tonne as of 2026-09-03, a rise of 3.1% from USD 1,414/tonne on 2026-08-27. Over the month the price has gained 12.3% from USD 1,298/tonne on 2026-08-04, and over the quarter it is up 7.1% from USD 1,361/tonne on 2026-06-05. Year on year the increase stands at 37.8%, from USD 1,058/tonne on 2025-09-03.

The 52-week high is USD 1,519/tonne, recorded on 2026-04-08, while the 52-week low of USD 963.88/tonne was set on 2025-11-17.

Claight market monitoring shows that isooctanol operating rates dropped to 71% and planned maintenance tightened spot supply, increasing cost support for DOP. According to Claight market monitoring, DOP industry operating rates remained below 50% as plants reduced production to mitigate losses from high raw material costs.

Claight market monitoring also reports that renewed friction between the United States and Iran drove crude oil and upstream propylene prices higher, raising DOP production costs. On the demand side, downstream PVC manufacturers shifted to a buy-as-needed strategy and refused to stockpile after prices hit 9,400-9,500 RMB/ton.