The International Trade Commission formally scheduled the final phase of countervailing duty investigation 701-TA-767 and antidumping duty investigation 731-TA-1750 on March 6, 2026, targeting animal feed-grade L-lysine imports from China classified under HTS subheading 2922.41.00. Commerce has preliminarily determined these products are both subsidized and sold at less-than-fair-value, setting up compliance systems for granular tracking requirements.

The investigation scope defines three distinct lysine forms with specific CAS registry numbers and concentration thresholds that compliance engineering teams must encode. Lysine monohydrochloride (lysine HCL) carries CAS number 657-27-2 and requires a minimum 78% lysine content by weight. Lysine sulfate, assigned CAS 60343-69-3, falls within a 40-70% lysine concentration range. Liquid lysine uses CAS 56-87-1 and must contain at least 50% lysine by weight.

Scope Detail: The investigation covers lysine coated or encapsulated for ruminant bioavailability, and explicitly includes lysine processed in third countries through commingling, diluting, form conversion (liquid to dry or dry to liquid), or coating—regardless of where final processing occurs.

For mixed products such as base mixes, premixes, and concentrates, Commerce specifies that only the lysine component falls within scope. This partial-product coverage creates classification complexity for systems that must parse ingredient lists and attribute duty liability to the lysine fraction alone under HTS 2922.41.00.

API Implementation Note: The molecular formulas present additional validation parameters: lysine HCL dry form is C₆H₁₄N₂O₂·HCl, lysine sulfate dry form is C₆H₁₆N₂O₆S, and liquid lysine is C₆H₁₄N₂O₂. Systems handling customs data should map these identifiers alongside HTS codes for complete AD/CVD screening.

The ITC will determine whether the U.S. industry is materially injured or threatened with material injury under sections 705(b) and 731(b) of the Tariff Act of 1930 (19 U.S.C. 1671d(b) and 1673d(b)). An affirmative final determination would trigger duty deposits on all covered merchandise, requiring importers to bond against potential liability retroactive to the preliminary determination date.

Trade compliance platforms serving the animal feed supply chain must now flag HTS 2922.41.00 entries originating from China for AD/CVD case association. The CAS-level specificity in this scope—three distinct registry numbers with defined concentration floors—demands chemical product databases synchronize with tariff classification systems to prevent misclassification or missed duty exposure on Chinese lysine imports.

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