Asian acrylonitrile markers plunged US$50 and US$38 a ton CFR Far East Asia and Southeast Asia respectively in the last week of September.
In China, spots offers fell US$50 a ton.
Acrylonitrile prices in Asian markets tanked reflecting the plunge in feedstock propylene cost in the third week. Ample supply in China also pulled down prices amid weak demand.
Downstream, styrene monomer was assessed down over the same period while ABS prices are expected to soften in October due to weak demand and raw material prices.