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The U.S. Department of Commerce has unleashed a crushing blow in the Japanese Glycine Antidumping lawsuit, slapping Resonac Corp. with a punishing 86.22% antidumping duty on imports after ruling the supplier failed to cooperate with its investigation. The decision, announced Thursday, could reshape trade flows in the chemical industry, where glycine—an amino acid widely used in food, pharmaceuticals, and industrial applications—plays a pivotal role.

The department said the duty, set to take effect Friday, reflects adverse inferences drawn from Resonac’s lack of cooperation, a move that effectively pushed the penalty sky-high.

Other Japanese Firms Face Lighter, but Significant, Penalties

Not all Japanese suppliers were hit as hard. Yuki Gosei Kogyo Co. Ltd. and Nagase & Co. Ltd., both named in the Commerce review, were handed a 9.84% antidumping rate—serious, but a far cry from the crushing tariff now imposed on Resonac.

The investigation stretched across a full year beginning in June 2023, with several Japanese glycine exporters initially included but later removed at the request of the U.S. petitioner, Chattem Chemicals Inc.

The Resonac–Showa Denko Twist

Adding a corporate drama to the case, Resonac was formerly known as Showa Denko KK. The name change came after a major corporate merger and integration in January 2023. Resonac sought a successor-in-interest review, hoping to sidestep higher penalties by clarifying its corporate status.

But the Commerce Department refused to grant that lifeline, instead concluding that Resonac was indeed Showa Denko’s successor. That determination cemented the massive duty and denied Resonac a clean escape from the review process.

Trade Shockwaves Ahead

For the U.S., the decision is both a protectionist shield and a stern warning to foreign suppliers: full cooperation is non-negotiable. For Resonac, the towering duty could choke its presence in the U.S. glycine market, potentially opening doors for domestic suppliers or alternative international exporters.

As this trade skirmish unfolds, industry watchers say the case underscores Washington’s growing willingness to wield tariffs like a hammer—reshaping supply chains and sending shockwaves far beyond the chemical sector.