3906.10.00.00 - Poly(methyl methacrylate)

This HTS category, 3906.10.00.00, specifically classifies poly(methyl methacrylate) (PMMA) in its primary forms. PMMA is a transparent thermoplastic known for its excellent optical clarity, weather resistance, and impact strength, often referred to by brand names such as Plexiglas or Lucite. This classification applies to the raw material itself, typically found in granular, powder, or liquid forms, before it is processed into finished articles like sheets, rods, or molded parts. The key characteristic for classification under this heading is the specific chemical composition, being a polymer derived from methyl methacrylate.

This category is distinguished from its sibling, 3906.90 (Other acrylic polymers), by the precise chemical structure. While both fall under the broader umbrella of acrylic polymers, 3906.10.00.00 is exclusively for homopolymers of methyl methacrylate. Category 3906.90 encompasses copolymers of methyl methacrylate with other monomers, or other acrylic polymers that do not meet the specific criteria for poly(methyl methacrylate). Therefore, the presence of any other monomer significantly changes the classification.

As this is a leaf node, there are no further subcategories within 3906.10.00.00. Classification decisions at this level will therefore hinge on confirming that the material is indeed poly(methyl methacrylate) and that it is presented in a primary form. Documentation such as chemical analysis reports or manufacturer specifications will be crucial in verifying the material's composition for customs purposes.