Trimethyl Phosphite (TMPi) from Japan
Trimethyl phosphite, a phosphorous acid ester, serves as a reagent in organic synthesis, antioxidant production, and pesticide manufacturing. HTS 2920.90.51.00 applies to its status as an inorganic nonmetal acid ester. Highly reactive reducing agent.
Duty Rate — Japan → United States
15%
Rate breakdown
9903.04.6211.3%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
• DOT hazardous material shipping papers mandatory due to pyrophoric tendencies
• Stabilizer addition documentation prevents reclassification as mixture