Trans-HFO-1234ze Isomer from China
The trans isomer of 1,1,3,3,3-Pentafluoro-2-(trifluoromethyl)-prop-1-ene (HFO-1234ze), a specific stereoisomer used in precision applications like specialty solvents. Classified under HTS 2903.59.10.10 as the named compound per Chapter 29 note (b) for mixtures of isomers. Its acyclic unsaturated fluorinated structure determines the tariff placement.
Duty Rate — China → United States
16.2%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Include stereochemical analysis (NMR/chromatography) to confirm trans isomer identity for specific classification
• Label containers clearly distinguishing trans from cis or mixed isomers to prevent reclassification
• Monitor for anti-dumping duties on fluorinated compounds from certain origins