Morning Market Update on Diethylene Glycol (DEG) (September 15, 2026)

I. Key Focus Points

1. Disruption to Saudi crude oil pipeline transportation and continued pressure from Houthi armed forces have intensified supply risks, leading to a rise in international oil prices.
2. This week, the average operating rate of domestic unsaturated polyester resin (UPR) plants was 32.5%, unchanged from the previous period.
3. From September 11–13, total shipments from two tank farms in Zhangjiagang amounted to 733 tons, with an average daily shipment volume over the weekend. As of now, inventory at Changjiang International and Fubao tank farms stands at 4,100 tons.

Core Logic: The ongoing instability in U.S.-Iran relations continues to drive up international oil prices. Diethylene glycol (DEG) demand faces pressure, resulting in a unidirectional market trend.

II. Price Table

Notes:

1. All product prices refer to National Standard Premium Grade products.
2. Crude oil prices are in USD/barrel; other three varieties are in RMB/ton.
3. RMB prices listed above are tax-inclusive cash-ex-factory prices.
4. Change rates represent period-over-period fluctuations.

III. Market Outlook

Chempricehub reported on September 15: Limited cargo arrivals replenished port inventories, while domestic plant supply remained stable enough to meet market demand. DEG is currently experiencing increased supply against steady demand. Weak fundamental conditions continue to exert downward pressure, causing persistent gradual declines, with limited impact from external positive factors.

Legend:

1. ↓↑ indicates significant volatility, highlighting data dimensions with changes exceeding 3%.
2. ↗↘ indicates narrow-range fluctuations, highlighting data within a 0–3% change range.