HS Code for SAN resin

Styrene-acrylonitrile (SAN) copolymers in primary forms are classified under HS code 3903.20. This code is situated in Chapter 39, which covers plastics and articles thereof. Heading 3903 is designated for polymers of styrene in primary forms. The subheading 3903.20 specifically identifies SAN, which is a copolymer consisting of styrene and acrylonitrile monomers. To be classified here, the styrene content must predominate by weight over any other single comonomer, and the product must be in a "primary form." According to Note 6 to Chapter 39, primary forms include liquids and pastes (including dispersions and solutions), as well as blocks of irregular shape, lumps, powders, granules, flakes, and similar bulk forms. SAN is valued for its transparency, thermal resistance, and rigidity, making it a common material for kitchenware and automotive components before it is molded into finished goods.

Products Included

• SAN resin pellets for injection molding
• SAN copolymer granules
• SAN beads for industrial processing
• SAN resin in liquid or paste form (primary forms)
• Unfilled or reinforced SAN compounds in bulk

Common Misclassification

SAN resin is often misclassified under HS code 3903.11 or 3903.19, which are for Polystyrene (PS). While both are styrene polymers, SAN contains acrylonitrile which requires classification under 3903.20. It is also frequently confused with ABS (Acrylonitrile-butadiene-styrene) classified under 3903.30. The absence of the butadiene component is the technical factor that distinguishes SAN from ABS.

FAQ

What is the HS code for SAN resin?

The HS code for Styrene-acrylonitrile (SAN) copolymers in primary forms is 3903.20.

What qualifies as a "primary form" for SAN?

Primary forms include raw materials like pellets, granules, powders, or liquids that have not yet been formed into finished products or semi-manufactured shapes like sheets or rods.