2903.48.00.00 - 1,1,1,3,3-Pentafluorobutane (HFC-365mfc) and 1,1,1,2,2,3,4,5,5,5-decafluoropentane (HFC-4310mee)

This HTS classification, 2903.48.00.00, specifically covers two hydrofluorocarbons (HFCs): 1,1,1,3,3-Pentafluorobutane (HFC-365mfc) and 1,1,1,2,2,3,4,5,5,5-decafluoropentane (HFC-4310mee). These are saturated, acyclic hydrocarbons where hydrogen atoms have been replaced by fluorine. Their distinct chemical structures and compositions differentiate them from other HFCs within the broader category of saturated fluorinated derivatives of acyclic hydrocarbons.

Distinguishing this node from its siblings involves examining the specific number and arrangement of fluorine and carbon atoms. For example, while other sibling codes like 2903.45.10.00 cover tetrafluoroethanes (four fluorine atoms), this category specifically includes compounds with a higher degree of fluorination and different carbon chain lengths, such as the five fluorine atoms in pentafluorobutane and the ten fluorine atoms in decafluoropentane. The presence of these specific isomers and their associated fluorination patterns is the primary classification criterion.

As this HTS code represents a leaf node, there are no further subcategories. The classification is definitive for the specified compounds, and any import or export transactions involving 1,1,1,3,3-Pentafluorobutane (HFC-365mfc) or 1,1,1,2,2,3,4,5,5,5-decafluoropentane (HFC-4310mee) would fall directly under this tariff line. It is crucial for customs professionals to verify the exact chemical identity of the imported or exported substance to ensure accurate classification under this specific code.