Syringic Acid from Mexico
Syringic acid (4-hydroxy-3,5-dimethoxybenzoic acid) contains one phenolic OH and two methoxy groups. Classified HTS 2918.19.20.00 under additional U.S. note 3. Lignin degradation product used in antioxidants and material science.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Multiple methoxy groups don't affect primary alcohol function classification
• Bio-derived from lignin; source documentation prevents natural extract confusion
• Polymer intermediate; declare intended use to avoid chemical preparation status