HS Code for Styrene

Styrene, also known as vinylbenzene or phenylethylene, is classified under HS code 2902.50 because it is a cyclic hydrocarbon. Chapter 29 of the Harmonized System covers organic chemicals, and heading 2902 specifically addresses hydrocarbons in their chemically pure or commercially pure forms. Styrene is an aromatic hydrocarbon consisting of a benzene ring with a vinyl group attachment. Because it is a fundamental building block in the petrochemical industry, primarily used for the production of polymers, it is categorized as a separate chemical entity. The classification under 2902.50 is straightforward for the monomeric form of the substance. It is essential to distinguish this from its polymerized versions, as the HS nomenclature separates monomers (Chapter 29) from polymers (Chapter 39). The purity of the styrene is a key factor; while commercial grades often contain inhibitors like TBC (4-tert-Butylcatechol) to prevent premature polymerization during transport, they remain classified here as long as they meet the criteria for 'chemically defined' organic compounds. The chemical formula C8H8 defines its position within the aromatic hydrocarbons. This classification is critical for global trade as styrene is a high-volume commodity used in the manufacture of polystyrene, ABS, and synthetic rubber. Customs authorities look for the CAS number 100-42-5 to verify the identity of the product against the declared HS code.

Products Included

• Monomeric styrene
• Vinylbenzene
• Phenylethylene
• Cinnamene
• Styrolene

Common Misclassification

The most common misclassification occurs with HS code 3903.11 or 3903.19, which are for polystyrene (the polymer). Styrene is the liquid monomer, whereas polystyrene is the solid plastic. Another error involves HS code 2902.90, which is a 'basket' category for other cyclic hydrocarbons; however, since styrene has its own specific subheading (2902.50), the use of the general code is incorrect under GRI 1.

FAQ

What is the HS code for styrene?

The HS code for styrene monomer is 2902.50.

Is styrene classified as a plastic?

No, styrene is a chemical monomer classified in Chapter 29. Only its polymerized form, polystyrene, is classified as a plastic in Chapter 39.