China has decided to adjust the anti-dumping duties for imports of solar-grade polysilicon from South Korea, China's Ministry of Commerce (MOFCOM) announced on Tuesday.

The new rates range from 4.4% to 113.8% and will come into effect on November 22.  

At the start of 2014 China presented final anti-dumping duties for five years on imports of the raw material from South Korea and the US. The rates for the eastern neighbour were set at between 2.4% and 48.7%.

The adjustment of the duties for South Korea follows investigation, triggered by an application in February 2016 by several domestic producers.

The decision unveiled on Tuesday calls for the following rates: 

Producer	Rate
OCI Company Ltd	4.4%
Hankook Silicon Co Ltd	9.5%
Hanwha Chemical Corp	8.9%
SMP Ltd	88.7%
Woongjin Polysilicon Co Ltd	113.8%
KCC Corp and Korean Advanced Materials (KAM Corp)	113.8%
Innovation Silicon Co Ltd	113.8%
All Others	88.7%