# HS code 2837.20: Complex cyanides

> HS code 2837.20 covers complex cyanides. It sits in heading 28.37 (cyanides, cyanide oxides and complex cyanides) in chapter 28 (inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes). Other goods of heading 28.37 are classified under 2837.11 (cyanides and cyanide oxides, of sodium) and 2837.19 (cyanides and cyanide oxides, other). National tariff lines under 2837.20 are live on border.bot for the United States (2 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/283720
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 28](https://border.bot/hs-codes/28) / [28.37](https://border.bot/hs-codes/2837) / [2837.20](https://border.bot/hs-codes/283720)

## Key facts

- HS code: 2837.20
- Covers: Complex cyanides
- Heading: [28.37: Cyanides, cyanide oxides and complex cyanides](https://border.bot/hs-codes/2837)
- Chapter: [28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes](https://border.bot/hs-codes/28)
- Edition: HS2022
- Duty in the United States: [See its 2 lines](https://border.bot/countries/united-states/hs-codes/283720)

## What this code covers

HS code 2837.20 covers complex cyanides.

The legal text of the subheading is “Complex cyanides”, in HS2022.

## What it doesn’t cover

Other goods of heading 28.37 are classified under 2837.11 (cyanides and cyanide oxides, of sodium) and 2837.19 (cyanides and cyanide oxides, other).

- [2837.11](https://border.bot/hs-codes/283711) Cyanides and cyanide oxides: Of sodium
- [2837.19](https://border.bot/hs-codes/283719) Cyanides and cyanide oxides: Other

## How it is structured

2837.20 is a six-digit subheading. Its first two digits, 28, are the chapter; the first four, 2837, are heading 28.37; the last two, 20, identify the subheading within the heading.

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

- Chapter 28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes
- Heading 28.37: Cyanides, cyanide oxides and complex cyanides
- Subheading 2837.20: Complex cyanides

## In other countries

National tariff lines under 2837.20 are live on border.bot for the United States (2 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/283720): 2 lines, used by 1 other country

- Previous subheading: [2837.19](https://border.bot/hs-codes/283719) Cyanides and cyanide oxides: Other
- Next subheading: [2839.11](https://border.bot/hs-codes/283911) Of sodium: Sodium metasilicates

## Frequently asked questions

### What does HS code 2837.20 cover?

HS code 2837.20 covers complex cyanides.

### Which heading and chapter is HS code 2837.20 in?

HS code 2837.20 is in heading 28.37 (cyanides, cyanide oxides and complex cyanides) in chapter 28 (inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes).

### Where are goods of heading 28.37 classified when 2837.20 doesn’t fit?

Other goods of heading 28.37 are classified under 2837.11 (cyanides and cyanide oxides, of sodium) and 2837.19 (cyanides and cyanide oxides, other).

### Which countries’ tariffs list national lines under HS code 2837.20?

National tariff lines under 2837.20 are live on border.bot for the United States (2 lines, 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/283720.json