Camphor Sulfonic Acid from Mexico
Camphor-10-sulfonic acid is a chiral resolving agent derived from sulfonation of camphor (bicyclic monoterpene phenol), containing only sulfo groups. It qualifies for HTS 2908.99.1500 as a nitrosated/sulfonated derivative of phenol-alcohols used in pharmaceutical synthesis.
Duty Rate — Mexico → United States
15.5%
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
• Include optical rotation specification (+/- enantiomer); TSCA registration required for US entry
• Common issue: Pharmaceutical intermediates need end-use statement to avoid Chapter 30 scrutiny