2903.71.01.00 - Chlorodifluoromethane (HCFC-22)

This HTS classification covers chlorodifluoromethane, commonly known as HCFC-22. This specific halogenated hydrocarbon is characterized by the presence of both chlorine and fluorine atoms attached to an acyclic hydrocarbon chain, with the empirical formula CHClF2. Its primary use has historically been as a refrigerant and as a blowing agent in the production of foam plastics.

Within the broader category of halogenated derivatives of acyclic hydrocarbons containing two or more different halogens, chlorodifluoromethane (HCFC-22) is distinguished by its specific chemical composition. Its siblings, such as dichlorotrifluoroethanes (HCFC-123) and dichlorofluoroethanes (HCFC-141b), differ in the number and arrangement of their halogen atoms and carbon chain length, leading to distinct chemical properties and applications. For instance, HCFC-123 has three fluorine atoms and two chlorine atoms on a two-carbon chain, while HCFC-22 has one chlorine and two fluorine atoms on a one-carbon chain.

As a leaf node in the HTS structure, 2903.71.01.00 represents a specific, distinct chemical compound. Therefore, it does not have further subcategories. Classification at this level is determined by the precise chemical identity and molecular structure of the imported or exported substance, differentiating it from other HCFCs and CFCs with varying halogen content and molecular formulas.