3904.50.00.00 - Vinylidene chloride polymers

HTS Code 3904.50.00.00 specifically classifies vinylidene chloride polymers in their primary forms. These polymers, which are characterized by the presence of vinylidene chloride monomers in their chemical structure, are distinct from other halogenated olefin polymers. The classification hinges on the specific monomer composition, prioritizing vinylidene chloride as the defining characteristic.

This category differentiates itself from sibling HTS codes such as 3904.10.00.00 (Poly(vinyl chloride), not mixed with any other substances) and others categorized under "Other poly(vinyl chloride)" by the absence of significant vinyl chloride as the primary repeating unit. While some vinylidene chloride polymers might contain small amounts of other monomers, the defining feature for this heading is the substantial presence of vinylidene chloride. It is also distinct from vinyl chloride copolymers (3904.30 and 3904.40) and fluoropolymers, which are classified under separate subheadings based on their specific halogenated olefin content.

As HTS Code 3904.50.00.00 represents a leaf node, there are no further subcategories within this specific code. Classification at this level therefore relies on confirming that the material's chemical composition primarily consists of vinylidene chloride polymers and that it is presented in a primary form, such as powders, granules, or blocks, as typically manufactured. This ensures accurate identification and adherence to customs regulations.