# HS code 3906.90: Acrylic polymers in primary forms

> HS code 3906.90 covers acrylic polymers in primary forms, other than those classified in 3906.10. It sits in heading 39.06 (acrylic polymers in primary forms) in chapter 39 (plastics and articles thereof). Other goods of heading 39.06 are classified under 3906.10 (poly(methyl methacrylate)).

Source: https://staging.border.bot/hs-codes/390690
Last updated: 13 October 2026

[HS codes](https://staging.border.bot/hs-codes) / [Chapter 39](https://staging.border.bot/hs-codes/39) / [39.06](https://staging.border.bot/hs-codes/3906) / [3906.90](https://staging.border.bot/hs-codes/390690)

## Key facts

- HS code: 3906.90
- Covers: Acrylic polymers in primary forms
- Heading: [39.06: Acrylic polymers in primary forms](https://staging.border.bot/hs-codes/3906)
- Chapter: [39: Plastics and articles thereof](https://staging.border.bot/hs-codes/39)
- Edition: HS2022
- Duty rates: [Set by each country’s tariff](https://staging.border.bot/countries)

## What this code covers

HS code 3906.90 covers acrylic polymers in primary forms, other than those classified in 3906.10.

The legal text of the subheading is “Other”, in HS2022.

## What it doesn’t cover

Other goods of heading 39.06 are classified under 3906.10 (poly(methyl methacrylate)).

- [3906.10](https://staging.border.bot/hs-codes/390610) Poly(methyl methacrylate)

## How it is structured

3906.90 is a six-digit subheading. Its first two digits, 39, are the chapter; the first four, 3906, are heading 39.06; the last two, 90, 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 39.06: Acrylic polymers in primary forms
- Subheading 3906.90: Other

## In other countries

No national tariff lines under 3906.90 are live on border.bot yet. Tariffs built on the Harmonized System (HS2022) use 3906.90 at six digits and add their own digits after it.

- Previous subheading: [3906.10](https://staging.border.bot/hs-codes/390610) Poly(methyl methacrylate)
- Next subheading: [3907.10](https://staging.border.bot/hs-codes/390710) Polyacetals

## Frequently asked questions

### What does HS code 3906.90 cover?

HS code 3906.90 covers acrylic polymers in primary forms, other than those classified in 3906.10.

### Which heading and chapter is HS code 3906.90 in?

HS code 3906.90 is in heading 39.06 (acrylic polymers in primary forms) in chapter 39 (plastics and articles thereof).

### Where are goods of heading 39.06 classified when 3906.90 doesn’t fit?

Other goods of heading 39.06 are classified under 3906.10 (poly(methyl methacrylate)).

## Sources and updates

The Harmonized System legal text comes from border.bot release 1 (edition HS 2022), imported from a file, and has been live since 13 October 2026.

This page was last updated on 13 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://staging.border.bot/hs-codes/390690.json