China's imports of polysilicon products from South Korea tumbled 28.4 percent on-month in July following anti-dumping allegations made against South Korean firms, government data showed Friday.

China imported 1,768 tons of polysilicon from South Korea last month, compared with 2,270 tons in the previous month, according to China's customs office. The July figure was also down 14 percent from 2015 tons a year earlier.

South Korean products made up 24.8 percent of China's total polysilicon imports, which was down 10.9 percentage points from 35.7 percent a month earlier.

The Chinese Ministry of Commerce announced last month that it is considering an anti-dumping investigation into South Korean polysilicon makers, following allegations by Chinese manufacturers of excessive price cutting.

Polysilicon, or polycrystalline silicon, is a key component of solar panels and the majority of the world's supply is used for the production of solar power panels.

China imported 64,600 tons of polysilicon in 2011, up 36 percent from the previous year. About 24 percent of China's polysilicon imports come from South Korea. The largest portion, 46 percent, comes from the U.S.

Market watchers said that China's declining exports of solar products amid global economic uncertainties have led to falling polysilicon demand from China.

"Given their high export dependency on China, South Korean polysilicon makers will be affected negatively," Brian Jin, an analyst at Woori Investment & Securities Co., said earlier.