2903.59.90.00/1,1,1,2,3,4,4,5,5,5-Decafluoropent-2-ene (trans)/Mexico

1,1,1,2,3,4,4,5,5,5-Decafluoropent-2-ene (trans) from Mexico

Trans-decafluoropent-2-ene functions as heat transfer fluid and dielectric gas. Classified HTS 2903.59.90.00 per stereochemical isomer rules in Chapter 29. Specific geometric isomer verified by NMR spectroscopy.

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

• Specify E-isomer content >95% per GC analysis

• Include dielectric strength test results (45 kV minimum)

• Verify global warming potential <1 per IPCC methodology