10-Undecenoic Acid from Mexico
10-Undecenoic acid, identical to undecylenic acid, is an 11-carbon unsaturated acyclic monocarboxylic acid with antifungal properties. HTS 2916.19.30.00 applies as it fits the chemical definition excluding specific enumerated acids. Common in pharmaceutical creams.
Duty Rate — Mexico → United States
16.1%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Synonym documentation required - accept both names but specify chemical formula
• GMP certification if pharmaceutical grade; bulk technical grade has different documentation
• Avoid reclassification to 3823 if purity <90%