Xylene Sulfonic Acid Mixture (Ortho/Meta/Para) from Mexico
Mixed xylene sulfonic acids from sulfonation contain only sulfo groups on phenolic rings, classified as isomers under Chapter 29 note 1(b). HTS 2908.99.1500 for these defined sulfonated phenol derivatives.
Duty Rate — Mexico → United States
15.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Isomer distribution analysis (ortho:meta:para ratios); total sulfonic >92%
• Pitfall: Declaring as 'mixed isomers' risks Chapter 38 if purity documentation lacking