2903.78.00.00/Perfluorohexanoic Acid (PFHxA)/Mexico

Perfluorohexanoic Acid (PFHxA) from Mexico

PFHxA is a six-carbon perfluorocarboxylic acid used in fluorochemical manufacturing. As a perhalogenated acyclic hydrocarbon derivative containing only fluorine, it precisely matches 2903.78.00.00 criteria. Subject to increasing environmental scrutiny.

Duty Rate — Mexico → United States

100%

Rate breakdown

9903.04.6096.3%Pharmaceuticals Annex IV: patented pharma articles — 100% 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)

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Import Tips

• Monitor EU POPs regulation updates; PFHxA faces phase-out pressures

• Declare CAS number 3078-92-0 explicitly on all shipping documents

• Implement secondary containment for spill prevention during customs inspection