3909.39.00.00 - Other

This HTS classification, 3909.39.00.00, encompasses "Other" amino-resins that are not specifically listed under a more precise subheading within heading 3909. Amino-resins are synthetic thermosetting resins formed by the reaction of formaldehyde with organic compounds containing amino groups, such as urea or melamine. These resins, in their primary forms (e.g., powders, granules, liquids), are broadly utilized in the manufacturing of adhesives, coatings, laminates, molding compounds, and textile treatments, owing to their excellent hardness, chemical resistance, and thermal stability.

This subheading distinguishes itself from its sibling category, 3909.31.00.00, which specifically covers Poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI). While polyurethanes also fall under heading 3909, the sibling subheading focuses exclusively on a particular type of isocyanate precursor, a key component in polyurethane production. Classification under 3909.39.00.00 is reserved for amino-resins that do not fit the description of MDI or polymeric MDI.

As a leaf node, this classification does not have further subcategories. Therefore, the focus for accurate classification rests on confirming that the material in question is indeed an amino-resin, in its primary form, and is not a specific type of amino-resin or a polyurethane precursor that would be classified under a more narrowly defined subheading within heading 3909. The residual nature of this "Other" category necessitates careful consideration of all preceding subheadings to ensure correct placement.