Tromethamine (Tris(hydroxymethyl)aminomethane) from Japan
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 — Japan → United States
15%
Rate breakdown
9903.04.628.5%Pharmaceuticals: patented pharma from JP/EU/KR/CH/LI — 15% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
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