Diethyl L-tartrate from China
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 — China → United States
16.2%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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