3903.19.00.00 - Other

This HTS classification covers types of polystyrene that are not classified under the "expandable" category. Polystyrene, in its various forms, is a synthetic aromatic hydrocarbon polymer made from the monomer styrene. This category is intended for polystyrene that does not possess the specific cellular structure or characteristics that allow it to expand when subjected to heat or pressure, as defined by HTS code 3903.11.00.00.

Distinguishing this category from its sibling, 3903.11.00.00, is crucial. The primary differentiator lies in the material's ability to undergo expansion. Expandable polystyrene has incorporated blowing agents, making it suitable for applications like packaging or insulation where volume expansion is a key functional property. This "other" polystyrene category encompasses solid forms of polystyrene that do not have this inherent characteristic.

Examples of goods falling under this classification include general-purpose polystyrene (GPPS) and high-impact polystyrene (HIPS) in their primary forms, such as granules, pellets, powders, or blocks. These are typically used as raw materials for manufacturing a wide range of plastic articles, including disposable cutlery, food packaging containers, and housings for electronic devices, but are not designed for expansion prior to their final use.