# HS code 2925.21: Imines and their derivatives; salts thereof, chlordimeform (ISO)

> HS code 2925.21 covers imines and their derivatives; salts thereof, chlordimeform (ISO). It sits in heading 29.25 (carboxyimide-function compounds (including saccharin and its salts) and imine-function compounds) in chapter 29 (organic chemicals). Other goods of heading 29.25 are classified under 2925.11 (imides and their derivatives; salts thereof, saccharin and its salts), 2925.12 (imides and their derivatives; salts thereof, glutethimide (INN)), 2925.19 (imides and their derivatives; salts thereof, other) and 2925.29 (imines and their derivatives; salts thereof, other). National tariff lines under 2925.21 are live on border.bot for the United States (1 line, also used by 1 other country).

Source: https://border.bot/hs-codes/292521
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 29](https://border.bot/hs-codes/29) / [29.25](https://border.bot/hs-codes/2925) / [2925.21](https://border.bot/hs-codes/292521)

## Key facts

- HS code: 2925.21
- Covers: Imines and their derivatives; salts thereof, chlordimeform (ISO)
- Heading: [29.25: Carboxyimide-function compounds (including saccharin and its salts) and imine-function compounds](https://border.bot/hs-codes/2925)
- 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/292521)

## What this code covers

HS code 2925.21 covers imines and their derivatives; salts thereof, chlordimeform (ISO).

The legal text of the subheading is “Imines and their derivatives; salts thereof: Chlordimeform (ISO)”, read under “Imines and their derivatives; salts thereof”, in HS2022.

## What it doesn’t cover

Other goods of heading 29.25 are classified under 2925.11 (imides and their derivatives; salts thereof, saccharin and its salts), 2925.12 (imides and their derivatives; salts thereof, glutethimide (INN)), 2925.19 (imides and their derivatives; salts thereof, other) and 2925.29 (imines and their derivatives; salts thereof, other).

- [2925.11](https://border.bot/hs-codes/292511) Imides and their derivatives; salts thereof: Saccharin and its salts
- [2925.12](https://border.bot/hs-codes/292512) Imides and their derivatives; salts thereof: Glutethimide (INN)
- [2925.19](https://border.bot/hs-codes/292519) Imides and their derivatives; salts thereof: Other
- [2925.29](https://border.bot/hs-codes/292529) Imines and their derivatives; salts thereof: Other

## How it is structured

2925.21 is a six-digit subheading. Its first two digits, 29, are the chapter; the first four, 2925, are heading 29.25; the last two, 21, identify the subheading within the heading.

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

- Chapter 29: Organic chemicals
- Heading 29.25: Carboxyimide-function compounds (including saccharin and its salts) and imine-function compounds
- Within the heading: Imines and their derivatives; salts thereof
- Subheading 2925.21: Chlordimeform (ISO)

## In other countries

National tariff lines under 2925.21 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/292521): 1 line, used by 1 other country

- Previous subheading: [2925.19](https://border.bot/hs-codes/292519) Imides and their derivatives; salts thereof: Other
- Next subheading: [2925.29](https://border.bot/hs-codes/292529) Imines and their derivatives; salts thereof: Other

## Frequently asked questions

### What does HS code 2925.21 cover?

HS code 2925.21 covers imines and their derivatives; salts thereof, chlordimeform (ISO).

### Which heading and chapter is HS code 2925.21 in?

HS code 2925.21 is in heading 29.25 (carboxyimide-function compounds (including saccharin and its salts) and imine-function compounds) in chapter 29 (organic chemicals).

### Where are goods of heading 29.25 classified when 2925.21 doesn’t fit?

Other goods of heading 29.25 are classified under 2925.11 (imides and their derivatives; salts thereof, saccharin and its salts), 2925.12 (imides and their derivatives; salts thereof, glutethimide (INN)), 2925.19 (imides and their derivatives; salts thereof, other) and 2925.29 (imines and their derivatives; salts thereof, other).

### Which countries’ tariffs list national lines under HS code 2925.21?

National tariff lines under 2925.21 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/292521.json