Chapter 3903 — Customs Tariff Headings

3903.20.00Styrene-acrylonitrile (SAN) copolymers

3903.30.00Acrylonitrile-butadiene-styrene (ABS) copolymers

3903.90.00Other

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Products classified under Tariff item 39.03

EPS Raw Expanded Beads

Pre-foamed expandable polystyrene beads in granular form, retaining a blowing agent and intended for rotational molding or foam block production. They are in primary forms as defined by Chapter 39 and remain expansible, meeting the tariff item's scope.

Gray Flame-Retardant EPS Beads

Gray expandable polystyrene beads containing a flame-retardant additive (HBCD) for construction insulation foam. The additive does not alter the primary expandable polymer status, so they remain classified under this tariff item.

High-Index EPS Beads H100

High-expansion-index polystyrene beads (H100) for thin-walled foam molding. They are in primary expandable form with a blowing agent, suitable for steam chest molding, and meet the tariff item's definition.

Pentane-Infused EPS Pellets

Polystyrene pellets impregnated with pentane as a blowing agent for steam expansion in foam molding. They are in primary forms and remain expansible, distinguishing them from rigid polystyrene.

Recyclable EPS Expandable Pellets

Recycled-content expandable polystyrene pellets for sustainable foam production. They meet polymer content rules and remain in primary expandable form, so they are classified under this tariff item.

Styrofoam Beads EPS

Expandable polystyrene beads (Styrofoam) for molding into foam products, containing pentane as a blowing agent. They are unexpanded or pre-expanded but remain in primary form and are expansible.

Unexpanded EPS Granules

Unexpanded polystyrene granules containing a blowing agent for in-plant expansion into foam blocks. They are in primary forms and are expansible, meeting the tariff item's precise scope.

White EPS Pre-Puff Beads

White expandable polystyrene pre-puff beads for lightweight foam packaging inserts. They are in primary form before final expansion and molding, and remain expansible.

Atactic Polystyrene Granules

Atactic polystyrene granules are an amorphous, non-crystalline form of polystyrene supplied in primary form (granules). They are classified under tariff item 3903.19.00 as 'other' polystyrene, since they are not specifically named in any other subheading of heading 39.03. These granules are commonly used as blend modifiers to improve clarity and impact resistance in various plastic products.

Crystal Polystyrene Resin

Crystal polystyrene resin, also known as general purpose polystyrene (GPPS), is a clear, amorphous homopolymer of styrene supplied as resin pellets. It falls under tariff item 3903.19.00 as 'other' polystyrene in primary forms, since it is not expandable and does not contain significant comonomers. This resin is used for applications requiring optical clarity, such as CD cases and medical labware.

Extrusion Grade Polystyrene Pellets

Extrusion grade polystyrene pellets are a form of general purpose polystyrene (GPPS) optimized for extrusion processes, supplied in primary pellet form. They are classified under tariff item 3903.19.00 as 'other' polystyrene, as they are not expandable and do not contain significant comonomers. These pellets feature low gel content, making them suitable for producing films and sheets used in food packaging.

General Purpose Polystyrene Pellets (GPPS)

General purpose polystyrene pellets (GPPS) are a transparent homopolymer of styrene in pellet form, classified under tariff item 3903.19.00 as 'other' polystyrene in primary forms. This material is widely used for packaging, disposable cups, and other consumer goods where clarity and rigidity are required. It is not expandable and does not contain significant comonomers, distinguishing it from other styrene polymer subheadings.

High Impact Polystyrene Resin (HIPS)

High impact polystyrene resin (HIPS) is a copolymer of styrene and butadiene, with butadiene content typically under 5% by weight. It is classified under tariff item 3903.19.00 as 'other' polystyrene, since the styrene monomer unit predominates and the butadiene content is below the threshold for other subheadings. HIPS is used for applications requiring impact resistance, such as appliance housings and toys.

Injection Molding Polystyrene Resin

Injection molding polystyrene resin is a high-flow polystyrene designed for precision injection molding of household items, supplied in primary form. It falls under tariff item 3903.19.00 as 'other' polystyrene, as it is not expandable and does not contain significant comonomers. This resin offers balanced viscosity for complex thin-wall parts, making it suitable for various consumer products.

Polystyrene Compounding Base Resin

Polystyrene compounding base resin is a narrow molecular weight distribution polystyrene resin designed for compounding, imported in primary form. It is classified under tariff item 3903.19.00 as 'other' polystyrene, as it is not expandable and does not contain significant comonomers. This resin serves as a base for custom blends in electronics and packaging industries.

Syndiotactic Polystyrene Pellets (SPS)

Syndiotactic polystyrene pellets (SPS) are a crystalline form of polystyrene produced by stereospecific polymerization, supplied in primary pellet form. They are classified under tariff item 3903.19.00 as 'other' polystyrene, as they are not expandable and do not contain significant comonomers. SPS is used in high-heat engineering applications, such as automotive components and electrical connectors.

Flame-Retardant SAN Copolymer Pellets

Flame-retardant SAN copolymer pellets, V-0 rated, used in electrical enclosures and battery casings. The halogen-free formulation keeps the primary polymer classification under tariff item 3903.20.00, with core SAN content at or above 95% by weight, meeting the subheading note requirements.

High-Clarity SAN Copolymer Resin

High-clarity SAN copolymer resin in granular form, designed for optical applications like light diffusers. With ≥95% styrene-acrylonitrile content by weight, it meets the criteria for tariff item 3903.20.00, offering a balance of clarity, rigidity, and chemical resistance.

Impact-Modified SAN Copolymer Granules

Impact-modified SAN copolymer granules with rubber modification for improved toughness in appliance components. The chemical modification does not change the primary classification under unmodified SAN per subheading notes, as the core styrene-acrylonitrile units remain ≥95% by weight.

Optical-Grade SAN Copolymer Masterbatch

Pre-colored optical SAN copolymer masterbatch for LCD bezels and instrument panels. The colorants are less than 5% by weight, maintaining classification under tariff item 3903.20.00 per subheading note (a)(1), with high light transmission and precise color control.

SAN Copolymer for Medical Device Extrusion

USP Class VI certified SAN copolymer for medical syringe barrels and IV components. It meets stringent biocompatibility while maintaining classification under tariff item 3903.20.00 through ≥95% styrene-acrylonitrile composition, ensuring compliance with medical standards.

Styrene-Acrylonitrile (SAN) Copolymer Pellets

Transparent SAN copolymer pellets used for injection molding applications. These pellets consist of styrene and acrylonitrile monomers where both units contribute 95% or more by weight of the total polymer content, meeting the classification criteria for tariff item 3903.20.00.

Asahi Kasei Stylac ABS

Asahi Kasei Stylac ABS is a high-rigidity acrylonitrile-butadiene-styrene copolymer supplied in primary forms such as pellets or granules. It is used in furniture manufacturing, where its impact resistance and dimensional stability are valued. This product falls under tariff item 3903.30.00 as a named ABS copolymer in primary forms.

BASF Terluran GP-22 ABS Pellets

BASF Terluran GP-22 is an injection-molding grade ABS copolymer resin in granular primary form, with acrylonitrile, butadiene, and styrene units comprising over 95% by weight. It is widely used in toys and household goods production. This product is classified under tariff item 3903.30.00 as a named ABS copolymer in primary forms.

Chi Mei Corporation PA-380 ABS

Chi Mei Corporation PA-380 ABS is a standard ABS copolymer designed for toy injection molding, supplied in primary forms. It meets the definition of acrylonitrile-butadiene-styrene copolymers under tariff item 3903.30.00. The product's composition ensures classification under this specific item.

Formosa Plastics PA-757 ABS

Formosa Plastics PA-757 ABS is a high-flow ABS copolymer for medical devices, provided in primary forms. It qualifies as a named ABS copolymer under tariff item 3903.30.00, with the comonomer units contributing over 95% by weight. This product is suitable for applications requiring precise molding.

INEOS Nova StorPlus ABS Resin

INEOS Nova StorPlus ABS Resin is a medium-impact ABS copolymer for storage cases and luggage, provided in primary resin pellets. The ABS comonomers exceed 95% by weight, and the product is not chemically modified, ensuring classification under tariff item 3903.30.00. It is a standard copolymer in primary forms.

JSR Corporation ABS Resin

JSR Corporation ABS Resin is an ABS copolymer for battery casings, supplied in primary pellet form. It falls under tariff item 3903.30.00 as a named ABS copolymer in primary forms. The product's composition meets the subheading note requirements for ABS copolymers.

Kumho Petrochemical ABS Polylac 142

Kumho Petrochemical ABS Polylac 142 is a fast-cycling ABS grade for consumer electronics, classified as a primary copolymer under tariff item 3903.30.00. The monomer balance ensures it meets the ABS copolymer definition. It is supplied in pellet form for injection molding.

LG Chem Lupoy GP-1000 ABS Resin

LG Chem Lupoy GP-1000 ABS Resin is a general-purpose ABS copolymer with acrylonitrile, butadiene, and styrene monomers each contributing significantly to the polymer content. It meets the 95% threshold for named ABS copolymers under tariff item 3903.30.00. The product is in primary form for various applications.

Lucky Petrochemicals HI-121H ABS

Lucky Petrochemicals HI-121H ABS is a high-impact ABS copolymer for helmets, supplied in pellet form. It meets the criteria for tariff item 3903.30.00 as a named ABS copolymer in primary forms. The product's high-impact properties make it suitable for safety equipment.

SABIC Lustran ABS 348

SABIC Lustran ABS 348 is a high-impact ABS copolymer in primary pellet form, composed of acrylonitrile-butadiene-styrene with comonomers meeting the 95% weight requirement of tariff item 3903.30.00. It is designed for automotive interior applications, offering excellent impact resistance and heat stability.

Samsung Cheil Delpet ABS

Samsung Cheil Delpet ABS is an ABS resin for packaging machinery parts, supplied in primary resin form. It is classified under tariff item 3903.30.00 as a named ABS copolymer. The product meets the subheading note requirements for ABS copolymers in primary forms.

Styron ABS Magnum 3453

Styron ABS Magnum 3453 is an ABS copolymer with balanced properties for piping fittings, in virgin pellet form. It meets the specifications of tariff item 3903.30.00 as a named ABS copolymer in primary forms. The product offers good impact resistance and processability.

Techno Polymer Toray ABS

Techno Polymer Toray ABS is an ABS resin for automotive exteriors, in standard pellet form. It meets the subheading copolymer definition under tariff item 3903.30.00. The product is a named ABS copolymer in primary forms, suitable for exterior automotive parts.

Total Petrochemicals Crystal ABS

Total Petrochemicals Crystal ABS is a clear, high-gloss copolymer resin for appliance trims, in primary form pellets. It meets the ABS comonomer weight criteria of tariff item 3903.30.00. The product is a named ABS copolymer in primary forms, offering clarity and gloss.

Versalis Ciclope ABS HH-541

Versalis Ciclope ABS HH-541 is a high-heat resistant copolymer in pellet form for electrical enclosures, with a standard acrylonitrile-butadiene-styrene composition. It qualifies under tariff item 3903.30.00 as a named ABS copolymer in primary forms. The product offers high heat resistance for electrical applications.

Blow Molding Polystyrene BMPS 450

Blow Molding Polystyrene BMPS 450 is a polystyrene resin in primary pellet form, designed for blow molding applications such as bottles. With a styrene monomer content exceeding 95% by weight, it qualifies as a homopolymer of styrene under heading 39.03, and is classified under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms.

Clear MBS Copolymer Beads for PVC Toughening

Clear MBS copolymer beads in primary form, composed of methyl methacrylate, butadiene, and styrene with a combined comonomer content of 95% or more by weight. These beads are used as an impact modifier to toughen PVC products, enhancing clarity and durability. They fall under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, since MBS copolymers are not specifically named in other subheadings of heading 39.03.

Crystal Polystyrene GPPS 535H

Crystal Polystyrene GPPS 535H is a clear, general-purpose polystyrene resin in pellet form, composed of over 95% styrene monomer units. It is used for injection molding applications and is classified under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, as it is a homopolymer not otherwise specified in the subheading.

Electronics Grade Polystyrene EGPS 600

Electronics Grade Polystyrene EGPS 600 is a low-static polystyrene resin in pellet form, with a styrene monomer content exceeding 95% by weight. It is used in electronics applications and falls under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, being a homopolymer not specifically named in the subheading.

Expandable Polystyrene EPS Beads F400

Expandable Polystyrene EPS Beads F400 are polystyrene beads impregnated with a pentane blowing agent, with styrene monomer content exceeding 95% by weight. Despite being expandable, they are classified under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, as the subheading 3903.11 for expandable polystyrene is not applicable in this tariff structure.

Extrusion Grade Polystyrene PSX 125

Extrusion Grade Polystyrene PSX 125 is a low-viscosity polystyrene resin in pellet form, designed for film extrusion. With a styrene monomer content exceeding 95% by weight, it is classified under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, as it is a homopolymer not otherwise specified.

Flame Retardant Polystyrene FRPS V0

Flame Retardant Polystyrene FRPS V0 is a polystyrene resin containing halogen-free flame retardants, with styrene monomer contributing over 95% by weight of the polymer content. It is in primary form (pellets) and is classified under tariff item 3903.90.00 as 'Other' polymers of styrene, as the flame retardants are considered additives that do not change the polymer's classification.

Foam Grade Polystyrene FGPS 100

Foam Grade Polystyrene FGPS 100 is a polystyrene resin in bead form, designed for foam production, with a styrene monomer content exceeding 95% by weight. It is classified under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, being a homopolymer not specifically named in the subheading.

High-Impact MBS Copolymer for Medical PVC

High-impact MBS copolymer pellets in primary form, designed for medical-grade PVC applications. The pellets contain methyl methacrylate, butadiene, and styrene comonomers totaling 95% or more by weight, providing clarity and impact resistance without phthalates. Classified under tariff item 3903.90.00 as 'Other' styrene polymers, as MBS is not a named copolymer in subheadings 3903.20 or 3903.30.

High Impact Polystyrene HIPS 825

High Impact Polystyrene HIPS 825 is a polystyrene resin modified with rubber for enhanced toughness, where styrene units exceed 95% by weight of the total polymer content. It is in primary pellet form and is classified under tariff item 3903.90.00 as 'Other' polymers of styrene, as the rubber modifier is an additive and the styrene homopolymer predominates.

Impact-Modified MBS Polymer Granules

Impact-modified MBS polymer granules in primary form, engineered for high-impact applications. The granules consist of methyl methacrylate, butadiene, and styrene with a combined weight of 95% or more, meeting the criteria for classification as a styrene copolymer. They are classified under tariff item 3903.90.00 as 'Other' polymers of styrene, since MBS is not specifically named in other subheadings of heading 39.03.

Injection Molding Polystyrene IMP 350

Injection Molding Polystyrene IMP 350 is a high-flow polystyrene resin in pellet form, with a styrene monomer content exceeding 95% by weight. It is used for precision injection molding and is classified under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, being a homopolymer not otherwise specified.

MBS Copolymer Resin Pellets

Transparent MBS copolymer resin pellets in primary form, where methyl methacrylate, butadiene, and styrene comonomers contribute 95% or more by weight. These pellets are used as impact modifiers for PVC, offering clarity and toughness. They are classified under tariff item 3903.90.00 as 'Other' styrene polymers, as MBS is not a named copolymer in subheadings 3903.20 or 3903.30.

MBS Impact Modifier Powder (Core-Shell Type)

Fine powder form of core-shell MBS copolymer, where a butadiene core is rubber-modified with a methyl methacrylate/styrene shell. The powder meets the 95% comonomer content threshold for methyl methacrylate, butadiene, and styrene, classifying it as a styrene copolymer in primary form. It is used as an impact modifier for PVC and falls under tariff item 3903.90.00 as 'Other' polymers of styrene.

Medical Grade Polystyrene MGPS Clear

Medical Grade Polystyrene MGPS Clear is a USP Class VI polystyrene resin in primary form, with a styrene monomer content exceeding 95% by weight. It is used for medical disposables and is classified under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, being a homopolymer not specifically named in the subheading.

Packaging Grade Polystyrene PGPS 300

Packaging Grade Polystyrene PGPS 300 is a crystal polystyrene resin in primary pellet form, designed for trays and films. With a styrene monomer content exceeding 95% by weight, it is classified under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, being a homopolymer not otherwise specified.

Polystyrene Resin GPPS 525

Polystyrene Resin GPPS 525 is a general-purpose polystyrene resin made from styrene monomer exceeding 95% by weight, used in packaging and consumer goods. It is in primary pellet form and is classified under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, being a homopolymer not specifically named in the subheading.

Super High Impact Polystyrene SHIPS 700

Super High Impact Polystyrene SHIPS 700 is a polystyrene resin with advanced rubber modification for superior impact resistance, where styrene content exceeds 95% by weight. It is in primary pellet form and is classified under tariff item 3903.90.00 as 'Other' polymers of styrene, as the rubber modifier is an additive and the styrene homopolymer predominates.

Thermoforming Polystyrene TFPS 200

Thermoforming Polystyrene TFPS 200 is a polystyrene resin in pellet form, designed for thermoforming applications. With a styrene monomer content exceeding 95% by weight, it is classified under tariff item 3903.90.00 as 'Other' polymers of styrene in primary forms, being a homopolymer not otherwise specified.