The U.S. Department of Commerce has determined that melamine from Japan is being sold in the U.S. at less than fair value, which means it's being sold for less than it costs to produce. As a result, they have set a high dumping margin of 115.11% on all other producers not individually investigated, and Commerce will continue to suspend liquidation of these goods until further notice. Mitsui Chemicals, the sole mandatory respondent, did not cooperate in the investigation, leading Commerce to use adverse facts available against them. The International Trade Commission will decide if the domestic industry is harmed by these imports, and if so, an antidumping order will be issued.
Simple Explanation
The U.S. Department of Commerce found out that melamine, a special kind of material from Japan, is being sold in the U.S. for less money than it costs to make, which isn't fair. So, they are making anyone who sells it pay extra money to fix that.