# HS code 2830.90: Sulphides; polysulphides, whether or not chemically defined

> HS code 2830.90 covers sulphides; polysulphides, whether or not chemically defined, other than those classified in 2830.10. It sits in heading 28.30 (sulphides; polysulphides, whether or not chemically defined) 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 28.30 are classified under 2830.10 (sodium sulphides).

Source: https://staging.border.bot/hs-codes/283090
Last updated: 13 October 2026

[HS codes](https://staging.border.bot/hs-codes) / [Chapter 28](https://staging.border.bot/hs-codes/28) / [28.30](https://staging.border.bot/hs-codes/2830) / [2830.90](https://staging.border.bot/hs-codes/283090)

## Key facts

- HS code: 2830.90
- Covers: Sulphides; polysulphides, whether or not chemically defined
- Heading: [28.30: Sulphides; polysulphides, whether or not chemically defined](https://staging.border.bot/hs-codes/2830)
- 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 2830.90 covers sulphides; polysulphides, whether or not chemically defined, other than those classified in 2830.10.

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

## What it doesn’t cover

Other goods of heading 28.30 are classified under 2830.10 (sodium sulphides).

- [2830.10](https://staging.border.bot/hs-codes/283010) Sodium sulphides

## How it is structured

2830.90 is a six-digit subheading. Its first two digits, 28, are the chapter; the first four, 2830, are heading 28.30; the last two, 90, 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 28.30: Sulphides; polysulphides, whether or not chemically defined
- Subheading 2830.90: Other

## In other countries

No national tariff lines under 2830.90 are live on border.bot yet. Tariffs built on the Harmonized System (HS2022) use 2830.90 at six digits and add their own digits after it.

- Previous subheading: [2830.10](https://staging.border.bot/hs-codes/283010) Sodium sulphides
- Next subheading: [2831.10](https://staging.border.bot/hs-codes/283110) Of sodium

## Frequently asked questions

### What does HS code 2830.90 cover?

HS code 2830.90 covers sulphides; polysulphides, whether or not chemically defined, other than those classified in 2830.10.

### Which heading and chapter is HS code 2830.90 in?

HS code 2830.90 is in heading 28.30 (sulphides; polysulphides, whether or not chemically defined) 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 28.30 classified when 2830.90 doesn’t fit?

Other goods of heading 28.30 are classified under 2830.10 (sodium sulphides).

## 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/283090.json