HS Code for HFO-1234ze

HFO-1234ze, or 1,3,3,3-tetrafluoropropene, is classified under HS code 2903.51. This classification is distinct from traditional HFCs because HFOs (hydrofluoroolefins) are unsaturated hydrocarbons, meaning they contain at least one carbon-carbon double bond. In the Harmonized System, heading 2903 covers halogenated derivatives of hydrocarbons. While subheadings 2903.41 through 2903.49 are dedicated to saturated derivatives, the 2903.5x and 2903.6x series cover unsaturated derivatives. Specifically, subheading 2903.51 was introduced to group together several key unsaturated fluorinated derivatives, including HFO-1234yf, HFO-1234ze, and HFO-1336mzz. The classification of HFO-1234ze under 2903.51 is mandatory because the chemical is explicitly named in the subheading description. This distinction is vital for regulatory purposes, as unsaturated fluorinated hydrocarbons typically have a significantly lower Global Warming Potential (GWP) than saturated HFCs. Proper classification under 2903.51 ensures that the product is recognized as a next-generation refrigerant or blowing agent, separate from the older, more environmentally impactful substances.

Products Included

• 1,3,3,3-tetrafluoropropene (HFO-1234ze)
• Trans-1,3,3,3-tetrafluoroprop-1-ene
• HFO-1234ze(E) used as a propellant
• HFO-1234ze used as a blowing agent

Common Misclassification

HFO-1234ze is frequently misclassified under HS code 2903.42 (HFC-32) or 2903.49 due to confusion between saturated HFCs and unsaturated HFOs. Because it is a tetrafluoropropene, it is also sometimes incorrectly placed in 2903.59, which is the category for "other" unsaturated fluorinated derivatives, despite 2903.51 being the specific and correct code.

FAQ

What is the HS code for HFO-1234ze?

The HS code for HFO-1234ze is 2903.51.

How does HFO-1234ze differ from HFCs in classification?

HFO-1234ze is an unsaturated derivative (containing a double bond), which places it in the 2903.5x series, whereas saturated HFCs are placed in the 2903.4x series.