Thioglycolic Acid with Stabilizer from Mexico
Thioglycolic acid containing added stabilizer for transport stability, explicitly allowed under Chapter 29 note (f). Remains classified as pure compound under HTS 2930.90.4910, not as mixture.
Duty Rate — Mexico → United States
14.2%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Document stabilizer type/concentration (<0.5% typical) per Chapter 29 note (f) to maintain pure compound status
• Include stability test data showing 12+ months shelf life under UN storage conditions
• Monitor for oxidation products; reject lots with >2% dithiodiglycolic acid