4,4-Bis(4-hydroxyphenyl) pentanoic acid from China
This is a specific carboxylic acid with phenol function, explicitly named in HTS 2918.29.3900. It features two 4-hydroxyphenyl groups attached to the 4-position of pentanoic acid, classifying it under carboxylic acids with phenol function but without other oxygen functions. Used primarily as a pharmaceutical intermediate.
Duty Rate — China → United States
37.5%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Provide Certificate of Analysis (CoA) confirming chemical identity and purity to avoid misclassification
• Ensure proper Hazard Communication labeling per GHS for phenolic carboxylic acids during customs clearance
• Verify REACH compliance if from EU; common pitfall is missing stability data for transport