3905.21.00.00 - In aqueous dispersion

This HTS category, 3905.21.00.00, specifically covers vinyl acetate copolymers that are presented in aqueous dispersion. These are polymer emulsions where vinyl acetate is a primary component, and the dispersion refers to the state in which the polymer particles are suspended in water. Such dispersions are commonly used as binders, adhesives, or coatings in a wide range of industrial and consumer applications.

This classification distinguishes itself from its sibling category, 3905.29.00.00, which encompasses "Other" vinyl acetate copolymers. The key differentiator is the physical form. While 3905.21.00.00 is exclusively for copolymers in aqueous dispersion, 3905.29.00.00 would cover vinyl acetate copolymers presented in other forms, such as solid pellets, powders, or liquid solutions not based on water. Therefore, the presence of water as the continuous phase is the defining characteristic for classification under 3905.21.00.00.

As a leaf node, this category has no further subcategories. Classification within 3905.21.00.00 is therefore definitive for vinyl acetate copolymers in aqueous dispersion, without the need for further breakdown based on specific polymer composition or end-use at this level of detail within the Harmonized Tariff Schedule. When classifying, the physical form as an aqueous dispersion is the sole criterion for this specific HTS code.