Propylene Oxide prices in the domestic market of USA declined by 3.07% during late May 2026 as easing feedstock propylene costs and cautious downstream purchasing activity outweighed ongoing supply concerns. Most transactions involved small, immediate-need orders, while the absence of large-scale restocking limited upward momentum across the market.
The supply of Propylene Oxide remained relatively balanced during May despite several market disruptions. Producers maintained regular supply flows, and overall product availability remained sufficient to meet contractual demand across major consuming sectors.
A key development during the month was the force majeure declared by LyondellBasell with Active Capacity TPM 50000, following a fire at its Bayport Choate facility. The incident temporarily reduced available production capacity and initially supported prices during early May by tightening regional propylene oxide supply conditions.
Feedstock dynamics shifted considerably throughout the month. Feedstock propylene costs strengthened during early May 2026, encouraging suppliers to maintain elevated offers in the market. However, feedstock values softened later in the month, reducing production cost pressure and prompting adjustments in Propylene Oxide quotations in the domestic market.
According to industry data, propane and propylene inventories declined by 0.4 million barrels during the week ending May 22, 2026. Despite the weekly decrease, inventories remained approximately 46% above the five-year average for this period, indicating comfortable overall feedstock availability.
Propylene oxide demand from polyurethane and propylene glycol sectors remained supportive and helped prevent sharper declines in Propylene Oxide prices. Buyers in these sectors remained active in securing material, particularly for near-term production requirements.
In contrast, demand for propylene oxide from polyether polyol manufacturers remained relatively subdued. Many purchasers focused only on immediate operational needs rather than rebuilding inventories, contributing to slower spot market activity and reducing overall consumption growth.
Market participants maintained cautious procurement strategies throughout late May. Most transactions involved small-volume purchases, while low purchasing activity and the absence of concentrated restocking made it difficult to generate effective upward momentum for Propylene Oxide prices.
Adjustments to international tariff policies also influenced market sentiment, affecting export competitiveness and contributing to uncertainty across portions of the chemical value chain. Buyers therefore remained selective in their purchasing decisions.
According to Chemanalayst data, the Propylene Oxide market is expected to remain stable to firm despite the recent decline. Healthy demand from polyurethane and propylene glycol sectors, disciplined supplier strategies, and potential logistics constraints could provide support. However, continued cautious buying activity and further easing in feedstock propylene prices may limit any substantial price recovery.
