# HS code 2849.90: Carbides, whether or not chemically defined

> HS code 2849.90 covers carbides, whether or not chemically defined, other than those classified in 2849.10 and 2849.20. It sits in heading 28.49 (carbides, 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 28.49 are classified under 2849.10 (of calcium) or 2849.20 (of silicon). National tariff lines under 2849.90 are live on border.bot for the United States (4 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/284990
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 28](https://border.bot/hs-codes/28) / [28.49](https://border.bot/hs-codes/2849) / [2849.90](https://border.bot/hs-codes/284990)

## Key facts

- HS code: 2849.90
- Covers: Carbides, whether or not chemically defined
- Heading: [28.49: Carbides, whether or not chemically defined](https://border.bot/hs-codes/2849)
- 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 4 lines](https://border.bot/countries/united-states/hs-codes/284990)

## What this code covers

HS code 2849.90 covers carbides, whether or not chemically defined, other than those classified in 2849.10 and 2849.20.

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

## What it doesn’t cover

Other goods of heading 28.49 are classified under 2849.10 (of calcium) or 2849.20 (of silicon).

- [2849.10](https://border.bot/hs-codes/284910) Of calcium
- [2849.20](https://border.bot/hs-codes/284920) Of silicon

## How it is structured

2849.90 is a six-digit subheading. Its first two digits, 28, are the chapter; the first four, 2849, are heading 28.49; 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 28.49: Carbides, whether or not chemically defined
- Subheading 2849.90: Other

## In other countries

National tariff lines under 2849.90 are live on border.bot for the United States (4 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/284990): 4 lines, used by 1 other country

- Previous subheading: [2849.20](https://border.bot/hs-codes/284920) Of silicon
- Next subheading: [2850.00](https://border.bot/hs-codes/285000) Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 28.49

## Frequently asked questions

### What does HS code 2849.90 cover?

HS code 2849.90 covers carbides, whether or not chemically defined, other than those classified in 2849.10 and 2849.20.

### Which heading and chapter is HS code 2849.90 in?

HS code 2849.90 is in heading 28.49 (carbides, 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 28.49 classified when 2849.90 doesn’t fit?

Other goods of heading 28.49 are classified under 2849.10 (of calcium) or 2849.20 (of silicon).

### Which countries’ tariffs list national lines under HS code 2849.90?

National tariff lines under 2849.90 are live on border.bot for the United States (4 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/284990.json