DL-Cysteine Hydrochloride from Mexico
DL-Cysteine hydrochloride is the racemic mixture salt of cysteine, featuring the characteristic organo-sulfur thiol group. Classified under HTS 2930.90.92.10 as it matches the specific subheading for cysteine hydrochloride, a separate chemically defined compound per Chapter 29 notes. Used in biochemical research and as a reducing agent.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Submit stereochemistry documentation (DL vs L-form) to customs for accurate HTS verification
• Avoid anti-dusting agents that could render it suitable for specific use, per chapter note (g), risking reclassification
• Register as a chemical import with TSCA if for industrial use in the US