PFOS Stabilized with Triethanolamine from Mexico
Perfluorooctane sulfonic acid with triethanolamine stabilizer added for preservation, permitted under Chapter 29 note (f). Remains classified in HTS 2904.31.00.00 as the stabilizer doesn't change primary character.
Duty Rate — Mexico → United States
13.7%
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
• Specify stabilizer percentage (<5% typically) and purpose in technical data sheet
• Validate stabilizer necessary for transport per Chapter 29 note (f) criteria
• Avoid excess amine that could reclassify as organic salt mixture