HS Code for Polystyrene

Polystyrene in its raw, unprocessed state is classified under HS code 390319. This classification falls under Chapter 39 of the Harmonized System, which governs plastics and articles thereof. Specifically, heading 3903 covers polymers of styrene in primary forms. Note 6 to Chapter 39 defines "primary forms" as liquids and pastes (including dispersions and solutions) or blocks of irregular shape, lumps, powders, granules, flakes, and similar bulk forms. HS code 390319 is a residual category for polystyrene that is not "expansible." Expansible polystyrene contains blowing agents for foam production and has its own specific code. Therefore, 390319 is used for General Purpose Polystyrene (GPPS) and High Impact Polystyrene (HIPS) when they are imported or exported as resins, pellets, or granules for injection molding or extrusion processes.

Products Included

• General Purpose Polystyrene (GPPS) pellets
• High Impact Polystyrene (HIPS) granules
• Polystyrene resin in primary powder form
• Styrene polymer lumps and irregular blocks
• Non-expansible polystyrene beads for industrial molding

Common Misclassification

The most common misclassification occurs with HS code 390311, which is reserved for expansible polystyrene. Expansible polystyrene contains chemicals that allow it to expand into foam when heated, whereas 390319 is for solid, non-foaming resins. Another error involves HS code 390320, which covers Styrene-acrylonitrile (SAN) copolymers. While SAN contains styrene, it is a chemically distinct copolymer. Furthermore, finished polystyrene articles, such as plastic cutlery or boxes, must be classified in headings 3921 through 3926 depending on their use, rather than the primary form code 390319.

FAQ

What is the HS code for Polystyrene?

The HS code for non-expansible polystyrene in primary forms (like pellets or granules) is 390319.

Is HIPS classified under the same code as GPPS?

Yes, both High Impact Polystyrene (HIPS) and General Purpose Polystyrene (GPPS) are classified under HS code 390319, provided they are in primary forms and are not expansible.