# HS code 2934.91: Aminorex (INN), brotizolam (INN), clotiazepam (INN), cloxazolam (INN), dextromoramide (INN), haloxazolam (INN), ketazolam (INN), mesocarb (INN), oxazolam (INN), pemoline (INN), phendimetrazine (INN), phenmetrazine (INN) and sufentanil (INN); salts thereof

> HS code 2934.91 covers aminorex (INN), brotizolam (INN), clotiazepam (INN), cloxazolam (INN), dextromoramide (INN), haloxazolam (INN), ketazolam (INN), mesocarb (INN), oxazolam (INN), pemoline (INN), phendimetrazine (INN), phenmetrazine (INN) and sufentanil (INN); salts thereof, other than those classified in 2934.92 and 2934.99. It sits in heading 29.34 (nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds) in chapter 29 (organic chemicals). Other goods of heading 29.34 are classified under 2934.10 (compounds containing an unfused thiazole ring (whether or not hydrogenated) in the structure), 2934.20 (compounds containing in the structure a benzothiazole ring- system (whether or not hydrogenated), not further fused), 2934.30 (compounds containing in the structure a phenothiazine ring- system (whether or not hydrogenated), not further fused), 2934.92 (other, other fentanyls or their derivatives) and 1 other. National tariff lines under 2934.91 are live on border.bot for the United States (1 line, also used by 1 other country).

Source: https://border.bot/hs-codes/293491
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 29](https://border.bot/hs-codes/29) / [29.34](https://border.bot/hs-codes/2934) / [2934.91](https://border.bot/hs-codes/293491)

## Key facts

- HS code: 2934.91
- Covers: Aminorex (INN), brotizolam (INN), clotiazepam (INN), cloxazolam (INN), dextromoramide (INN), haloxazolam (INN), ketazolam (INN), mesocarb (INN), oxazolam (INN), pemoline (INN), phendimetrazine (INN), phenmetrazine (INN) and sufentanil (INN); salts thereof
- Heading: [29.34: Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds](https://border.bot/hs-codes/2934)
- Chapter: [29: Organic chemicals](https://border.bot/hs-codes/29)
- Edition: HS2022
- Duty in the United States: [See its 1 line](https://border.bot/countries/united-states/hs-codes/293491)

## What this code covers

HS code 2934.91 covers aminorex (INN), brotizolam (INN), clotiazepam (INN), cloxazolam (INN), dextromoramide (INN), haloxazolam (INN), ketazolam (INN), mesocarb (INN), oxazolam (INN), pemoline (INN), phendimetrazine (INN), phenmetrazine (INN) and sufentanil (INN); salts thereof, other than those classified in 2934.92 and 2934.99.

The legal text of the subheading is “Other: Aminorex (INN), brotizolam (INN), clotiazepam (INN), cloxazolam (INN), dextromoramide (INN), haloxazolam (INN), ketazolam (INN), mesocarb (INN), oxazolam (INN), pemoline (INN), phendimetrazine (INN), phenmetrazine (INN) and sufentanil (INN); salts thereof”, read under “Other”, in HS2022.

## What it doesn’t cover

Other goods of heading 29.34 are classified under 2934.10 (compounds containing an unfused thiazole ring (whether or not hydrogenated) in the structure), 2934.20 (compounds containing in the structure a benzothiazole ring- system (whether or not hydrogenated), not further fused), 2934.30 (compounds containing in the structure a phenothiazine ring- system (whether or not hydrogenated), not further fused), 2934.92 (other, other fentanyls or their derivatives) and 1 other.

- [2934.10](https://border.bot/hs-codes/293410) Compounds containing an unfused thiazole ring (whether or not hydrogenated) in the structure
- [2934.20](https://border.bot/hs-codes/293420) Compounds containing in the structure a benzothiazole ring- system (whether or not hydrogenated), not further fused
- [2934.30](https://border.bot/hs-codes/293430) Compounds containing in the structure a phenothiazine ring- system (whether or not hydrogenated), not further fused
- [2934.92](https://border.bot/hs-codes/293492) Other: Other fentanyls and their derivatives
- [2934.99](https://border.bot/hs-codes/293499) Other: Other

## How it is structured

2934.91 is a six-digit subheading. Its first two digits, 29, are the chapter; the first four, 2934, are heading 29.34; the last two, 91, identify the subheading within the heading.

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

- Chapter 29: Organic chemicals
- Heading 29.34: Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds
- Within the heading: Other
- Subheading 2934.91: Aminorex (INN), brotizolam (INN), clotiazepam (INN), cloxazolam (INN), dextromoramide (INN), haloxazolam (INN), ketazolam (INN), mesocarb (INN), oxazolam (INN), pemoline (INN), phendimetrazine (INN), phenmetrazine (INN) and sufentanil (INN); salts thereof

## In other countries

National tariff lines under 2934.91 are live on border.bot for the United States (1 line, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/293491): 1 line, used by 1 other country

- Previous subheading: [2934.30](https://border.bot/hs-codes/293430) Compounds containing in the structure a phenothiazine ring- system (whether or not hydrogenated), not further fused
- Next subheading: [2934.92](https://border.bot/hs-codes/293492) Other: Other fentanyls and their derivatives

## Frequently asked questions

### What does HS code 2934.91 cover?

HS code 2934.91 covers aminorex (INN), brotizolam (INN), clotiazepam (INN), cloxazolam (INN), dextromoramide (INN), haloxazolam (INN), ketazolam (INN), mesocarb (INN), oxazolam (INN), pemoline (INN), phendimetrazine (INN), phenmetrazine (INN) and sufentanil (INN); salts thereof, other than those classified in 2934.92 and 2934.99.

### Which heading and chapter is HS code 2934.91 in?

HS code 2934.91 is in heading 29.34 (nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds) in chapter 29 (organic chemicals).

### Where are goods of heading 29.34 classified when 2934.91 doesn’t fit?

Other goods of heading 29.34 are classified under 2934.10 (compounds containing an unfused thiazole ring (whether or not hydrogenated) in the structure), 2934.20 (compounds containing in the structure a benzothiazole ring- system (whether or not hydrogenated), not further fused), 2934.30 (compounds containing in the structure a phenothiazine ring- system (whether or not hydrogenated), not further fused), 2934.92 (other, other fentanyls or their derivatives) and 1 other.

### Which countries’ tariffs list national lines under HS code 2934.91?

National tariff lines under 2934.91 are live on border.bot for the United States (1 line, 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/293491.json