Asian acrylonitrile marker the CFR Far East Asia further surged US$20 a ton in the third week of December.
In China, offers for offshore cargoes were at unchanged at US$1,150-1,200 a ton.
Acrylonitrile markets in Asia continued to remain driven by short supply of prompt cargoes as lower run rates hit supplies.
In China, offers rose amid market concerns about tight availability of prompt cargoes.