4,4'-Biphenol (CAS 92-88-6) from Mexico
4,4'-Biphenol is a polyphenolic compound consisting of two hydroxyphenyl groups linked by a biphenyl bond, classified under HTS 2907.29.15.00 as a specific other polyphenol. It is a white crystalline solid used primarily as a chemical intermediate in organic synthesis. This pure, chemically defined organic compound falls squarely within Chapter 29 heading for polyphenols.
Duty Rate — Mexico → United States
10%
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
• Verify purity and CAS number on Certificate of Analysis to confirm classification as chemically defined compound per Chapter 29 note (a); Provide SDS and impurity levels (<1%) to avoid reclassification; Declare exact chemical name and structure to prevent customs disputes on polyphenol identity