Methyl 3-Mercaptopropionate from Mexico
Methyl 3-mercaptopropionate is an organo-thiol ester used in polymer synthesis and flavor chemistry. HTS 2930.90.92.51 classification as other organo-sulfur compound with primary thiol functionality. Intermediate for methionine production.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Refractive index testing confirms identity (1.456-1.458)
• Pungent odor requires sealed secondary containment for customs inspection
• Methionine production declaration may trigger agricultural import review