# 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).

Source: https://staging.border.bot/hs-codes/283720
Last updated: 13 October 2026

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

## Key facts

- HS code: 2837.20
- Covers: Complex cyanides
- Heading: [28.37: Cyanides, cyanide oxides and complex cyanides](https://staging.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://staging.border.bot/hs-codes/28)
- Edition: HS2022
- Duty rates: [Set by each country’s tariff](https://staging.border.bot/countries)

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

No national tariff lines under 2837.20 are live on border.bot yet. Tariffs built on the Harmonized System (HS2022) use 2837.20 at six digits and add their own digits after it.

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

## Sources and updates

The Harmonized System legal text comes from border.bot release 1 (edition HS 2022), imported from a file, and has been live since 13 October 2026.

This page was last updated on 13 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://staging.border.bot/hs-codes/283720.json