# United States tariff line 2921.44.05.00: 4,4'-Bis (α,α-dimethylbenzyl) diphenylamine; andN-Nitrosodiphenylamine

> In the United States tariff, line 2921.44.05.00 covers aromatic monoamines and their derivatives; salts thereof, diphenylamine and its derivatives; salts thereof, 4,4'-Bis (α,α-dimethylbenzyl) diphenylamine; andN-Nitrosodiphenylamine. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 2921.44 in heading 29.21 (chapter 29).

Source: https://border.bot/countries/united-states/hs-codes/2921440500
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 29](https://border.bot/countries/united-states/hs-codes/29) / [2921.44](https://border.bot/countries/united-states/hs-codes/292144) / [2921.44.05.00](https://border.bot/countries/united-states/hs-codes/2921440500)

## Key facts

- Tariff line: 2921.44.05.00
- Covers: Aromatic monoamines and their derivatives; salts thereof, diphenylamine and its derivatives; salts thereof, 4,4'-Bis (α,α-dimethylbenzyl) diphenylamine; andN-Nitrosodiphenylamine
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [2921.44](https://border.bot/hs-codes/292144)

## What this line covers

In the United States tariff, line 2921.44.05.00 covers aromatic monoamines and their derivatives; salts thereof, diphenylamine and its derivatives; salts thereof, 4,4'-Bis (α,α-dimethylbenzyl) diphenylamine; andN-Nitrosodiphenylamine.

Its legal text is “4,4'-Bis (α,α-dimethylbenzyl) diphenylamine; andN-Nitrosodiphenylamine”, read under “Aromatic monoamines and their derivatives; salts thereof” and “Diphenylamine and its derivatives; salts thereof”.

## How it is structured

It falls under HS subheading 2921.44 in heading 29.21 (chapter 29). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 29: Organic chemicals
- Heading 29.21: Amine-function compounds
- Subheading 2921.44: Aromatic monoamines and their derivatives; salts thereof
- Within the subheading: Diphenylamine and its derivatives; salts thereof
- Line 2921.44.05.00: 4,4'-Bis (α,α-dimethylbenzyl) diphenylamine; andN-Nitrosodiphenylamine

## 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 2921.44 yet.

- [The Harmonized System text for 2921.44](https://border.bot/hs-codes/292144)

## Other lines under 2921.44

- [2921.44.10.00](https://border.bot/countries/united-states/hs-codes/2921441000) Nitrodiphenylamine
- [2921.44.20.00](https://border.bot/countries/united-states/hs-codes/2921442000) Products described in additional U.S. note 3 to section VI
- [2921.44.70.00](https://border.bot/countries/united-states/hs-codes/2921447000) Other

- Previous line: [2921.43.90.90](https://border.bot/countries/united-states/hs-codes/2921439090) Other
- Next line: [2921.44.10.00](https://border.bot/countries/united-states/hs-codes/2921441000) Nitrodiphenylamine

## Frequently asked questions

### What does tariff line 2921.44.05.00 cover in the United States tariff?

In the United States tariff, line 2921.44.05.00 covers aromatic monoamines and their derivatives; salts thereof, diphenylamine and its derivatives; salts thereof, 4,4'-Bis (α,α-dimethylbenzyl) diphenylamine; andN-Nitrosodiphenylamine.

### What is the general (MFN) duty on 2921.44.05.00 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/2921440500.json