Atactic Polystyrene Granules
Atactic Polystyrene is an amorphous, non-crystalline polystyrene variant in granule form, falling under HTS 3903.19.00.00 as other polystyrene in primary forms. It serves as a blend modifier for improving clarity and impact in other plastics.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing over 70% petroleum oils as carrier
High solvent content classifies as petroleum oils, not polymers.
If vinyl chloride copolymer with minor styrene
Predominant vinyl chloride monomer dictates PVC copolymer heading.
If for industrial use as polyethylene modifier blend
Blends classified by predominant monomer per subheading note (b).
Not sure which classification is right?
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Import Tips & Compliance
• Provide FTIR or NMR analysis proving atactic structure and 95%+ styrene content
• Declare exact melt flow index to assist CBP in verifying primary form status
Related Products under HTS 3903.19.00.00
High Impact Polystyrene Resin (HIPS)
High Impact Polystyrene (HIPS) is a copolymer of styrene and butadiene, with butadiene content typically under 5% by weight, making it a polystyrene under HTS 3903.19.00.00 as it does not meet specific copolymer subheadings. It is supplied in primary pellet form for injection molding into durable consumer goods like toys and appliance housings.
General Purpose Polystyrene Pellets (GPPS)
General Purpose Polystyrene (GPPS) is a homopolymer of styrene in transparent pellet form, classified under HTS 3903.19.00.00 as 'other' polystyrene not specified elsewhere. Used primarily for packaging, disposable cups, and clear plastic cases due to its clarity and rigidity.
Syndiotactic Polystyrene Pellets (SPS)
Syndiotactic Polystyrene (SPS) features crystalline structure from stereospecific polymerization, classified in primary pellet form under HTS 3903.19.00.00 as other polystyrene. Used in high-heat engineering applications like automotive parts.
Polystyrene Compounding Base Resin
Narrow molecular weight distribution polystyrene resin designed for compounding, imported in primary form under HTS 3903.19.00.00. Serves as base for custom blends in electronics and packaging industries.
Injection Molding Polystyrene Resin
High flow polystyrene resin for precision injection molding of household items, falling under HTS 3903.19.00.00 as other polystyrene in primary forms. Balanced viscosity for complex thin-wall parts.
Crystal Polystyrene Resin
Crystal Polystyrene, a clear GPPS variant, is imported as resin pellets under HTS 3903.19.00.00 for applications requiring optical clarity like CD cases and medical labware. Meets 'other' polystyrene criteria with over 95% styrene monomer units.