ZHENGZHOU - PTA (purified terephthalic acid) futures closed lower Tuesday in daytime trading on the Zhengzhou Commodity Exchange (ZCE).

The most active PTA contract for January 2021 delivery lost 28 yuan ($4.25) to close at 3,428 yuan per ton.

On Tuesday, the total trading volume for 12 listed PTA futures contracts on the ZCE was about 1.6 million lots with a turnover of 28.49 billion yuan.

As the world's largest producer and consumer of PTA, China listed PTA futures on the ZCE in 2006 and opened them to international investors in November 2018.

PTA, a commodity chemical and textile raw material, is a downstream product of petroleum and one of the most important bulk organic raw materials in China.