# United States tariff line 3908.90.20.00: Bis(4-amino-3-methylcyclohexyl)methane- isophthalic acid-laurolactam copolymer

> In the United States tariff, line 3908.90.20.00 covers bis(4-amino-3-methylcyclohexyl)methane- isophthalic acid-laurolactam copolymer. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 3908.90 in heading 39.08 (chapter 39).

Source: https://border.bot/countries/united-states/hs-codes/3908902000
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 39](https://border.bot/countries/united-states/hs-codes/39) / [3908.90](https://border.bot/countries/united-states/hs-codes/390890) / [3908.90.20.00](https://border.bot/countries/united-states/hs-codes/3908902000)

## Key facts

- Tariff line: 3908.90.20.00
- Covers: Bis(4-amino-3-methylcyclohexyl)methane- isophthalic acid-laurolactam copolymer
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [3908.90](https://border.bot/hs-codes/390890)

## What this line covers

In the United States tariff, line 3908.90.20.00 covers bis(4-amino-3-methylcyclohexyl)methane- isophthalic acid-laurolactam copolymer.

Its legal text is “Bis(4-amino-3-methylcyclohexyl)methane- isophthalic acid-laurolactam copolymer”, read under “Other”.

## How it is structured

It falls under HS subheading 3908.90 in heading 39.08 (chapter 39). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 39: Plastics and articles thereof
- Heading 39.08: Polyamides in primary forms
- Subheading 3908.90: Other
- Line 3908.90.20.00: Bis(4-amino-3-methylcyclohexyl)methane- isophthalic acid-laurolactam copolymer

## Duty

Goods under this line enter free of general (MFN) duty.

## In other countries

No other national tariff on border.bot has live lines under 3908.90 yet.

- [The Harmonized System text for 3908.90](https://border.bot/hs-codes/390890)

## Other lines under 3908.90

- [3908.90.70.00](https://border.bot/countries/united-states/hs-codes/3908907000) Other

- Previous line: [3908.10.00.00](https://border.bot/countries/united-states/hs-codes/3908100000) Polyamide-6, -11, -12, -6,6, -6,9, -6,10 or -6,12
- Next line: [3908.90.70.00](https://border.bot/countries/united-states/hs-codes/3908907000) Other

## Frequently asked questions

### What does tariff line 3908.90.20.00 cover in the United States tariff?

In the United States tariff, line 3908.90.20.00 covers bis(4-amino-3-methylcyclohexyl)methane- isophthalic acid-laurolactam copolymer.

### What is the general (MFN) duty on 3908.90.20.00 in the United States?

Goods under this line enter free of general (MFN) duty.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 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.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/3908902000.json