2903.73.01.00 - Dichlorofluoroethanes (HCFC-141, 141b)

This HTS classification covers dichlorofluoroethanes, commonly known by their HCFC designations such as HCFC-141 and HCFC-141b. These are acyclic hydrocarbons that have been halogenated with both chlorine and fluorine atoms. The primary characteristic defining this subcategory is the specific ratio and arrangement of these halogens on the ethane backbone. These compounds are typically used as refrigerants, blowing agents for foam production, and cleaning solvents, though their use is often regulated due to their ozone-depleting potential.

Within the broader category of halogenated derivatives of acyclic hydrocarbons containing two or more different halogens, this specific HTS code distinguishes itself by the precise composition of dichlorofluoroethanes. For example, it is distinct from chlorodifluoromethane (HCFC-22) which has a different number of chlorine and fluorine atoms, or dichlorotrifluoroethanes (HCFC-123) which possess an additional fluorine atom. The enumeration of specific HCFC numbers like 141 and 141b serves to pinpoint the exact chemical entities falling under this code.

As this node represents a leaf category within the HTS, there are no further subdivisions or subcategories. Therefore, the classification is specific to the defined dichlorofluoroethanes. Importers and exporters should ensure their products precisely match the chemical structure and nomenclature represented by HCFC-141 and HCFC-141b to correctly apply this classification. Any variations in the number or type of halogen atoms would necessitate classification under a different HTS code.