Harmonized System Code Classification

3903.90 is a classification under the Harmonized System (HS) code for the primary forms of styrene polymers, specifically for other types not otherwise specified. This code includes materials such as methyl methacrylate butadiene styrene (MBS) copolymers, which are used in a variety of applications due to their impact resistance and transparency.

Examples of products that might fall under this HS code include:

• Methyl Methacrylate Butadiene Styrene (MBS) Copolymer: A type of thermoplastic used in the production of transparent and impact-resistant materials.
• Polystyrene Copolymers: These are used in various industries, including packaging, construction, and consumer goods.
• Modified Polystyrene Resins: These are used in the production of various products, including toys, household items, and industrial components.