# United States tariff line 2922.31.00.00: Amfepramone (INN), methadone (INN) and normethadone (INN); salts thereof

> In the United States tariff, line 2922.31.00.00 covers amino-aldehydes, amino-ketones and amino-quinones, other than those containing more than one kind of oxygen function; salts thereof, amfepramone (INN), methadone (INN) and normethadone (INN); salts thereof. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 2922.31 in heading 29.22 (chapter 29).

Source: https://border.bot/countries/united-states/hs-codes/2922310000
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) / [2922.31](https://border.bot/countries/united-states/hs-codes/292231) / [2922.31.00.00](https://border.bot/countries/united-states/hs-codes/2922310000)

## Key facts

- Tariff line: 2922.31.00.00
- Covers: Amino-aldehydes, amino-ketones and amino-quinones, other than those containing more than one kind of oxygen function; salts thereof, amfepramone (INN), methadone (INN) and normethadone (INN); salts thereof
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [2922.31](https://border.bot/hs-codes/292231)

## What this line covers

In the United States tariff, line 2922.31.00.00 covers amino-aldehydes, amino-ketones and amino-quinones, other than those containing more than one kind of oxygen function; salts thereof, amfepramone (INN), methadone (INN) and normethadone (INN); salts thereof.

Its legal text is “Amfepramone (INN), methadone (INN) and normethadone (INN); salts thereof”, read under “Amino-aldehydes, amino-ketones and amino-quinones, other than those containing more than one kind of oxygen function; salts thereof”.

## How it is structured

It falls under HS subheading 2922.31 in heading 29.22 (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 29.22: Oxygen-function amino-compounds
- Subheading 2922.31: Amino-aldehydes, amino-ketones and amino-quinones, other than those containing more than one kind of oxygen function; salts thereof
- Line 2922.31.00.00: Amfepramone (INN), methadone (INN) and normethadone (INN); salts thereof

## 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 2922.31 yet.

- [The Harmonized System text for 2922.31](https://border.bot/hs-codes/292231)

- Previous line: [2922.29.81.90](https://border.bot/countries/united-states/hs-codes/2922298190) Other
- Next line: [2922.39.05.00](https://border.bot/countries/united-states/hs-codes/2922390500) 1-Amino-2,4-dibromoanthraquinone; and 2-Amino-5-chlorobenzophenone

## Frequently asked questions

### What does tariff line 2922.31.00.00 cover in the United States tariff?

In the United States tariff, line 2922.31.00.00 covers amino-aldehydes, amino-ketones and amino-quinones, other than those containing more than one kind of oxygen function; salts thereof, amfepramone (INN), methadone (INN) and normethadone (INN); salts thereof.

### What is the general (MFN) duty on 2922.31.00.00 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/2922310000.json