# HS heading 39.03: Polymers of styrene, in primary forms > HS heading 39.03 covers polymers of styrene, in primary forms. It is in chapter 39 (plastics and articles thereof). It is split into 5 subheadings: 3903.11 (polystyrene, expansible), 3903.19 (polystyrene, other), 3903.20 (styrene-acrylonitrile (SAN) copolymers), 3903.30 (acrylonitrile-butadiene-styrene (ABS) copolymers) and 3903.90 (other). National tariff lines under heading 39.03 are live on border.bot for the United States (6 lines, also used by 1 other country). Source: https://border.bot/hs-codes/3903 Last updated: 11 October 2026 [HS codes](https://border.bot/hs-codes) / [Chapter 39](https://border.bot/hs-codes/39) / [39.03](https://border.bot/hs-codes/3903) ## Key facts - Heading: 39.03 - Description: Polymers of styrene, in primary forms - Chapter: 39: Plastics and articles thereof - Subheadings: 5 - Edition: HS2022 ## What this code covers HS heading 39.03 covers polymers of styrene, in primary forms. It is split into 5 subheadings: 3903.11 (polystyrene, expansible), 3903.19 (polystyrene, other), 3903.20 (styrene-acrylonitrile (SAN) copolymers), 3903.30 (acrylonitrile-butadiene-styrene (ABS) copolymers) and 3903.90 (other). - [3903.11](https://border.bot/hs-codes/390311) Polystyrene: Expansible - [3903.19](https://border.bot/hs-codes/390319) Polystyrene: Other - [3903.20](https://border.bot/hs-codes/390320) Styrene-acrylonitrile (SAN) copolymers - [3903.30](https://border.bot/hs-codes/390330) Acrylonitrile-butadiene-styrene (ABS) copolymers - [3903.90](https://border.bot/hs-codes/390390) Other ## What it doesn’t cover Other goods of chapter 39 are classified in its other 25 headings, listed below. - [39.01](https://border.bot/hs-codes/3901) Polymers of ethylene, in primary forms - [39.02](https://border.bot/hs-codes/3902) Polymers of propylene or of other olefins, in primary forms - [39.04](https://border.bot/hs-codes/3904) Polymers of vinyl chloride or of other halogenated olefins, in primary forms - [39.05](https://border.bot/hs-codes/3905) Polymers of vinyl acetate or of other vinyl esters, in primary forms; other vinyl polymers in primary forms - [39.06](https://border.bot/hs-codes/3906) Acrylic polymers in primary forms - [39.07](https://border.bot/hs-codes/3907) Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms - [39.08](https://border.bot/hs-codes/3908) Polyamides in primary forms - [39.09](https://border.bot/hs-codes/3909) Amino-resins, phenolic resins and polyurethanes, in primary forms - [39.10](https://border.bot/hs-codes/3910) Silicones in primary forms - [39.11](https://border.bot/hs-codes/3911) Petroleum resins, coumarone-indene resins, polyterpenes, polysulphides, polysulphones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms - [39.12](https://border.bot/hs-codes/3912) Cellulose and its chemical derivatives, not elsewhere specified or included, in primary forms - [39.13](https://border.bot/hs-codes/3913) Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms - [39.14](https://border.bot/hs-codes/3914) Ion-exchangers based on polymers of headings 39.01 to 39.13, in primary forms - [39.15](https://border.bot/hs-codes/3915) Waste, parings and scrap, of plastics - [39.16](https://border.bot/hs-codes/3916) Monofilament of which any cross-sectional dimension exceeds 1 mm, rods, sticks and profile shapes, whether or not surface-worked but not otherwise worked, of plastics - [39.17](https://border.bot/hs-codes/3917) Tubes, pipes and hoses, and fittings therefor (for example, joints, elbows, flanges), of plastics - [39.18](https://border.bot/hs-codes/3918) Floor coverings of plastics, whether or not self-adhesive, in rolls or in the form of tiles; wall or ceiling coverings of plastics, as defined in Note 9 to this Chapter - [39.19](https://border.bot/hs-codes/3919) Self-adhesive plates, sheets, film, foil, tape, strip and other flat shapes, of plastics, whether or not in rolls - [39.20](https://border.bot/hs-codes/3920) Other plates, sheets, film, foil and strip, of plastics, non-cellular and not reinforced, laminated, supported or similarly combined with other materials - [39.21](https://border.bot/hs-codes/3921) Other plates, sheets, film, foil and strip, of plastics - [39.22](https://border.bot/hs-codes/3922) Baths, shower-baths, sinks, wash-basins, bidets, lavatory pans, seats and covers, flushing cisterns and similar sanitary ware, of plastics - [39.23](https://border.bot/hs-codes/3923) Articles for the conveyance or packing of goods, of plastics; stoppers, lids, caps and other closures, of plastics - [39.24](https://border.bot/hs-codes/3924) Tableware, kitchenware, other household articles and hygienic or toilet articles, of plastics - [39.25](https://border.bot/hs-codes/3925) Builders' ware of plastics, not elsewhere specified or included - [39.26](https://border.bot/hs-codes/3926) Other articles of plastics and articles of other materials of headings 39.01 to 39.14 ## How it is structured Heading 39.03 is one of 26 headings in chapter 39. Its first two digits, 39, are the chapter; the next two, 03, number the heading within it. Its subheadings add two more digits (3903.11, 3903.19, 3903.20). ## In other countries National tariff lines under heading 39.03 are live on border.bot for the United States (6 lines, also used by 1 other country). - [United States](https://border.bot/countries/united-states/hs-codes/39): 6 lines, used by 1 other country - Previous heading: [39.02](https://border.bot/hs-codes/3902) Polymers of propylene or of other olefins, in primary forms - Next heading: [39.04](https://border.bot/hs-codes/3904) Polymers of vinyl chloride or of other halogenated olefins, in primary forms ## Frequently asked questions ### What does HS heading 39.03 cover? HS heading 39.03 covers polymers of styrene, in primary forms. ### Which chapter is HS heading 39.03 in? HS heading 39.03 is in chapter 39 (plastics and articles thereof). ### How many subheadings does HS heading 39.03 have? HS heading 39.03 has 5 subheadings: 3903.11 (polystyrene, expansible), 3903.19 (polystyrene, other), 3903.20 (styrene-acrylonitrile (SAN) copolymers), 3903.30 (acrylonitrile-butadiene-styrene (ABS) copolymers) and 3903.90 (other). ### Which countries’ tariffs list national lines under HS heading 39.03? National tariff lines under heading 39.03 are live on border.bot for the United States (6 lines, also used by 1 other country). ## Sources and updates The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026. This page was last updated on 11 October 2026. Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling. Machine-readable: https://border.bot/hs-codes/3903.json