Perfluoroisobutene (PFIB)
Perfluoroisobutene used as chemical intermediate despite high toxicity requiring special handling. HTS 2903.59.90.00 classification as branched unsaturated fluorinated acyclic hydrocarbon. Chapter 29 note (g) permits safety identification additives.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If linear chain perfluorobutene isomers
Branched vs linear carbon skeletons have different provisions.
If decomposition to fluorophosgene
Hydrolysis products containing phosphorus classified as inorganic.
If cyclic fluorinated intermediates
Ring strain stabilization shifts heterocyclic classification.
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Import Tips & Compliance
• Require DEA Schedule 1 chemical controls and end-user verification
• Use specialized PFIB-rated regulators with fluoropolymer diaphragms
• Include LC50 mammalian inhalation toxicity data (<0.02 ppm/4h)
Related Products under HTS 2903.59.90.00
Perfluorobutene (C4F8)
Perfluorobutene is an unsaturated fluorinated acyclic hydrocarbon used primarily in plasma etching processes for semiconductor manufacturing. It falls under HTS 2903.59.90.00 as a halogenated derivative of hydrocarbons, specifically an unsaturated fluorinated derivative of acyclic hydrocarbons, not elsewhere specified. This chemically defined organic compound meets Chapter 29 note (a) for separate compounds.
Perfluoro-1-butene
Perfluoro-1-butene is a fully fluorinated C4 alkene used in chemical synthesis and as a reactive intermediate for fluoropolymer production. Classified under HTS 2903.59.90.00 as an 'other' unsaturated fluorinated derivative of acyclic hydrocarbons per Chapter 29 scope. Its complete fluorination distinguishes it from partially halogenated hydrocarbons.
1H-Pentafluoropropene (HFO-1234yf)
HFO-1234yf is a low-GWP hydrofluoroolefin refrigerant used in automotive air conditioning systems as a replacement for HFC-134a. It qualifies under HTS 2903.59.90.00 as an unsaturated fluorinated derivative of acyclic hydrocarbons with hydrogen substitution. Meets Chapter 29 definition for halogenated organic compounds.
Perfluoropentene (C5F10)
Perfluoropentene serves as a specialty gas for plasma cleaning and etching in microelectronics fabrication. Falls under HTS 2903.59.90.00 as an unsaturated fluorinated acyclic hydrocarbon per Chapter 29 note (a). Its complete perfluorination excludes it from partially halogenated hydrocarbon classifications.
Trifluoroethylene (HFC=CF2)
Trifluoroethylene is a fluorinated monomer used in copolymer production for specialty elastomers and electronic materials. Classified under HTS 2903.59.90.00 as an unsaturated fluorinated acyclic hydrocarbon derivative. Chapter 29 note (a) applies to this separate chemically defined compound.
Pentafluoropropene (C3F6)
Pentafluoropropene functions as an etching gas in semiconductor manufacturing and as a reactive intermediate. It meets HTS 2903.59.90.00 criteria as an 'other' unsaturated fluorinated acyclic hydrocarbon. Excluded from colorants, enzymes, or fuels per Chapter 29 exclusion notes.