In May 2012, the government of China initiated a new anti-dumping investigation and definitive duties were imposed in November 2014. In January 2019, a sunset review was initiated.



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Chinese Versions Available:

Definitive duties:
Definitive anti dumping duties

Ministry of Commerce of the People’s Republic of China, MOFCOM Announcement No. 78 of 2017, English version published on 22 November 2017:
Ministry of Commerce of the People's Republic of China, MOFCOM Announcement No. 2 of 2019, issued on 18 January 2019, 商务部公告2019年第2号 关于对原产于美国和韩国的进口太阳能级多晶硅反倾销措施进行期终复审调查的立案公告:

Inception date: 18 Jul 2013 | Removal date: open ended
Still in force


On July 20, 2012, the Ministry of Commerce (MOFCOM) of the People's Republic of China initiated an anti-dumping investigation on solar-grade polysilicon from the US and the Republic of Korea.
The concerned HS code is 2804.6190 but the investigation does not target the electronic-grade polysilicon falling under this category.

On May 2, 2012, on behalf of the Chinese domestic industry, four domestic Chinese companies formally submitted an application for the initiation of this anti-dumping investigation to the MOFCOM. 
On 18 July 2013, MOFCOM released its preliminary ruling on anti-dumping investigation against imports of solar-grade poly-silicon originated from US and South Korea in its Announcement No.48, 2013, leading to the introduction of provisional anti-dumping duties on 24 July 2013. The AD rate varies between 12.3 and 57 percent.

For US companies (company name - AD rate):

  • REC Solar Grade Silicon LLC - 57%
  • REC Advanced Silicon Materials LLC - 57%
  • Hemlock Semiconductor Corporation - 53.30%
  • MEMC Pasadena, Inc. - 53.70%
  • AE Polysilicon Corporation - 57%
  • All Others - 57%

For South Korean companies (company name - AD rate):

  • Woongjin Polysilicon Co., Ltd. - 12.30%
  • OCI Company Ltd. - 2.40%
  • Hankook Silicon Co., Ltd. - 2.80%
  • KCC Corp. and Korean Advanced Materials (KAM Corp.) - 48.70%
  • Innovation Silicon Co., Ltd. 48.70% 6. All Others - 12.30%

On 20 January 2014, China released announcement No. 5/2014 introducing definitive anti-dumping duties. The AD rate has not been changed with respect to the provisional one. The duty is maintained for five years from the 20 January 2014.

On 22 November 2017, the Ministry of Commerce of the People’s Republic of China amended the definitive duty imposed on imports of the subject good from the Republic of Korea following the conclusion of a midterm review. The rate of duty is from 22 November 2017 between 4.4.% and 113.8% depending on the company. The midterm review was initiated in November 2016.

On 20 January 2019, the Ministry of Commerce of the People's Republic of China initiated a sunset review of the antidumping duty imposed on imports of solar-grade polysilicon from the United States and the Republic of Korea. This follows the application lodged on 16 November 2018 by a number of domestic companies. The definitive duty will remain in force for the duration of the review. The announcement initiating the sunset review was issued on 18 January 2019.