# HS code 3921.12: Cellular, of polymers of vinyl chloride

> HS code 3921.12 covers cellular, of polymers of vinyl chloride. It sits in heading 39.21 (other plates, sheets, film, foil and strip, of plastics) in chapter 39 (plastics and articles thereof). Other goods of heading 39.21 are classified under 3921.11 (cellular, of polymers of styrene), 3921.13 (cellular, of polyurethanes), 3921.14 (cellular, of regenerated cellulose), 3921.19 (cellular, of other plastics) or 1 other. National tariff lines under 3921.12 are live on border.bot for the United States (5 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/392112
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 39](https://border.bot/hs-codes/39) / [39.21](https://border.bot/hs-codes/3921) / [3921.12](https://border.bot/hs-codes/392112)

## Key facts

- HS code: 3921.12
- Covers: Cellular, of polymers of vinyl chloride
- Heading: [39.21: Other plates, sheets, film, foil and strip, of plastics](https://border.bot/hs-codes/3921)
- Chapter: [39: Plastics and articles thereof](https://border.bot/hs-codes/39)
- Edition: HS2022
- Duty in the United States: [See its 5 lines](https://border.bot/countries/united-states/hs-codes/392112)

## What this code covers

HS code 3921.12 covers cellular, of polymers of vinyl chloride.

The legal text of the subheading is “Cellular: Of polymers of vinyl chloride”, read under “Cellular”, in HS2022.

## What it doesn’t cover

Other goods of heading 39.21 are classified under 3921.11 (cellular, of polymers of styrene), 3921.13 (cellular, of polyurethanes), 3921.14 (cellular, of regenerated cellulose), 3921.19 (cellular, of other plastics) or 1 other.

- [3921.11](https://border.bot/hs-codes/392111) Cellular: Of polymers of styrene
- [3921.13](https://border.bot/hs-codes/392113) Cellular: Of polyurethanes
- [3921.14](https://border.bot/hs-codes/392114) Cellular: Of regenerated cellulose
- [3921.19](https://border.bot/hs-codes/392119) Cellular: Of other plastics
- [3921.90](https://border.bot/hs-codes/392190) Other

## How it is structured

3921.12 is a six-digit subheading. Its first two digits, 39, are the chapter; the first four, 3921, are heading 39.21; the last two, 12, identify the subheading within the heading.

Countries add their own digits after these six for their national tariff lines.

- Chapter 39: Plastics and articles thereof
- Heading 39.21: Other plates, sheets, film, foil and strip, of plastics
- Within the heading: Cellular
- Subheading 3921.12: Of polymers of vinyl chloride

## In other countries

National tariff lines under 3921.12 are live on border.bot for the United States (5 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/392112): 5 lines, used by 1 other country

- Previous subheading: [3921.11](https://border.bot/hs-codes/392111) Cellular: Of polymers of styrene
- Next subheading: [3921.13](https://border.bot/hs-codes/392113) Cellular: Of polyurethanes

## Frequently asked questions

### What does HS code 3921.12 cover?

HS code 3921.12 covers cellular, of polymers of vinyl chloride.

### Which heading and chapter is HS code 3921.12 in?

HS code 3921.12 is in heading 39.21 (other plates, sheets, film, foil and strip, of plastics) in chapter 39 (plastics and articles thereof).

### Where are goods of heading 39.21 classified when 3921.12 doesn’t fit?

Other goods of heading 39.21 are classified under 3921.11 (cellular, of polymers of styrene), 3921.13 (cellular, of polyurethanes), 3921.14 (cellular, of regenerated cellulose), 3921.19 (cellular, of other plastics) or 1 other.

### Which countries’ tariffs list national lines under HS code 3921.12?

National tariff lines under 3921.12 are live on border.bot for the United States (5 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/392112.json