The price of ethylene glycol loosened in September. According to data from Shengyi Society, as of September 15th, the average price of domestic oil to ethylene glycol was 4458.33/ton, a decrease of 0.59% from the average price of 4485 yuan/ton on September 1st.
In terms of port ethylene glycol, the spot contract basis for port ethylene glycol on September 15, 2025 is running weakly. The intraday basis trading range for this week’s contract is+95 to+108. As of the closing, the contract basis price for this week is+97 to+99, the contract basis price for September is+100 to+102, and the contract basis price for October is+74 to+78.
The spot price of domestic coal to polyester grade ethylene glycol (loose water, tax included, self pickup) per unit is 4000-4140 yuan/ton.
In terms of external ethylene glycol, as of September 12th, recent cargo negotiations have resulted in a transaction price of around 516 US dollars per ton.
Supply and demand outlook:
In October, supply and demand shifted towards a loose balance, and the fulfillment of equipment supply affected market balance.
Ethylene glycol inventory
On September 15, 2025, the total inventory of ethylene glycol in the main ports of East China was 395600 tons, an increase of 32400 tons compared to the total inventory of 363200 tons on September 11; Compared to June 30th, the total inventory of ethylene glycol in the East China main port was 482000 tons, a decrease of 86400 tons.
Future expectations
There is an expectation of an increase in the short-term arrival of ethylene glycol at the port, and the explicit inventory at the port will continue to rise. At the same time, pre holiday stocking factors may lead to good port shipment performance this month. At present, the supply and demand are tight, and the delivery basis is supported. However, the expected production of new devices has led to expectations of loose supply and demand in the coming months. It is expected that the recent fluctuations will be mainly weak, with limited downward space.