Tromethamine (Tris(hydroxymethyl)aminomethane) from Mexico
Tromethamine, or Tris base, is an organic amino buffer used in biochemistry and pharmaceuticals. HTS 2922.50.50.00 classification applies to this amino alcohol with three hydroxymethyl groups. Essential for pH control in cell culture media.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• GMP-grade requires additional FDA registration and quality control certificates
• Common in biotech; verify end-use declaration prevents pharmaceutical mixture misclassification
• Hygroscopic nature requires sealed packaging documentation