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Halogenated derivatives of hydrocarbons: > Unsaturated fluorinated derivatives of acyclic hydrocarbons: > Other: > Other
Duty Rate (from China)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified 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.
Heptafluoropentene
Heptafluoropentene acts as a deposition precursor in chemical vapor deposition for fluorocarbon films. Classified HTS 2903.59.90.00 as unsaturated fluorinated acyclic hydrocarbon per Chapter 29 scope. Pure compound status confirmed by spectroscopic analysis.
Nonafluoropentene
Nonafluoropentene provides high fluorine content for plasma polymerization applications. Meets HTS 2903.59.90.00 as 'other' unsaturated fluorinated acyclic hydrocarbons. Chapter 29 note (g) permits trace stabilizers without reclassification.
Undecafluoropentene
Undecafluoropentene functions in fluoropolymer surface modification processes. Classified under HTS 2903.59.90.00 meeting criteria for unsaturated acyclic fluorinated hydrocarbons. Excluded from Chapter 29 prohibitions on fuels or colorants.
Perfluoro-2-pentene
Perfluoro-2-pentene serves as a selective etchant for advanced semiconductor nodes. Falls under HTS 2903.59.90.00 as unsaturated fluorinated acyclic hydrocarbon isomer. Chapter 29 classification rules prioritize principal chemical character.
1,1,1,2,3,4,4,5,5,5-Decafluoropent-2-ene (trans)
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.
Perfluorohexene (C6F12)
Perfluorohexene used in fluorocarbon plasma deposition for optical coatings. Meets HTS 2903.59.90.00 as longer-chain unsaturated fluorinated acyclic hydrocarbon. Chapter 29 note (e) allows transport solvents.
2H-Heptafluoropropene
2H-Heptafluoropropene serves as monomer for fluorinated acrylic polymers. Classified under HTS 2903.59.90.00 as unsaturated hydrofluorocarbon derivative. Distinguished from perfluorocarbons by strategic hydrogen placement.
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.
1,1,3,3,3-Pentafluoropropene
This isomer of pentafluoropropene serves as a building block for fluorinated surfactants and specialty chemicals. Falls under HTS 2903.59.90.00 per Chapter 29 classification rules for unsaturated fluorocarbons. Distinguished from saturated derivatives by C=C double bond.