2903.45.10.00 - 1,1,1,2-Tetrafluoroethane (HFC-134a) and 1,1,2,2-tetrafluoroethane (HFC-134)

This HTS category, 2903.45.10.00, specifically covers mixtures of 1,1,1,2-Tetrafluoroethane (commonly known as HFC-134a) and 1,1,2,2-tetrafluoroethane (HFC-134). These are saturated, acyclic, fluorinated hydrocarbons, aligning with their parent classification under Chapter 29. HFC-134a is a widely recognized refrigerant and propellant, while HFC-134 is a related compound.

This specific classification is distinguished from its siblings by the precise combination of tetrafluoroethane isomers. For instance, sibling categories cover simpler fluorinated methanes (like HFC-23, HFC-32, HFC-41) or ethane and propane derivatives with varying degrees and positions of fluorine substitution. The key differentiator for 2903.45.10.00 lies in its focus on the specific tetrafluoroethane compounds and their mixtures.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Classification at this level is final for the described substances, requiring precise identification of the chemical compounds to ensure accurate import and export declarations.