The U.S. Department of Commerce has issued a preliminary determination in favor of a petition requesting that antidumping duties be placed on imports of sodium sulfate anhydrous from Canada. Commerce found that Canada has dumped the product in the U.S. at a rate of 9.85%. Sodium sulfate anhydrous is used in the refining process of glass manufacturing.

According to the U.S. Geological Survey’s Mineral Commodity Summaries report in January 2013, glass made up 18% of sodium sulfate consumption in the U.S. at the time.

Commerce has instructed U.S. Customs and Border Protection to collect duties from importers of sodium sulfate anhydrous from Canada based on the 9.85% rate. According to Commerce, imports of the product from Canada were valued at approximately $5.7 million in 2018.

Three U.S. sodium sulfate producers, Cooper Natural Resources, Elementis Global and Searles Valley Minerals, petitioned for an investigation into the dumping in April 2019, arguing that sodium sulfate imports were being sold in the U.S. at a less than fair value.

Commerce is scheduled to announce its final determination March 10, 2020. If the final determination is affirmative, the U.S. International Trade Commission will be required to make its final injury determination by April 23, 2020.