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Diethyl L-tartrate from Mexico

Diethyl L-tartrate contains a five-membered lactone-like structure in tartaric acid derivatives with oxygen heteroatoms, classified under HTS 2932.20.50 per ester rules. Used as chiral auxiliary in asymmetric synthesis.

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

Enantiomeric excess (>99% ee) certification mandatory for research grade

Light-sensitive; amber glass bottles required for stability

Avoid 'catalyst' declaration which may trigger different documentation