# HS code 8105.90: Cobalt mattes and other intermediate products of cobalt metallurgy; cobalt and articles thereof, including waste and scrap

> HS code 8105.90 covers cobalt mattes and other intermediate products of cobalt metallurgy; cobalt and articles thereof, including waste and scrap, other than those classified in 8105.20 and 8105.30. It sits in heading 81.05 (cobalt mattes and other intermediate products of cobalt metallurgy; cobalt and articles thereof, including waste and scrap) in chapter 81 (other base metals; cermets; articles thereof). Other goods of heading 81.05 are classified under 8105.20 (cobalt mattes or other intermediate products of cobalt metallurgy; unwrought cobalt; powders) and 8105.30 (waste and scrap). National tariff lines under 8105.90 are live on border.bot for the United States (1 line, also used by 1 other country).

Source: https://border.bot/hs-codes/810590
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 81](https://border.bot/hs-codes/81) / [81.05](https://border.bot/hs-codes/8105) / [8105.90](https://border.bot/hs-codes/810590)

## Key facts

- HS code: 8105.90
- Covers: Cobalt mattes and other intermediate products of cobalt metallurgy; cobalt and articles thereof, including waste and scrap
- Heading: [81.05: Cobalt mattes and other intermediate products of cobalt metallurgy; cobalt and articles thereof, including waste and scrap](https://border.bot/hs-codes/8105)
- Chapter: [81: Other base metals; cermets; articles thereof](https://border.bot/hs-codes/81)
- Edition: HS2022
- Duty in the United States: [See its 1 line](https://border.bot/countries/united-states/hs-codes/810590)

## What this code covers

HS code 8105.90 covers cobalt mattes and other intermediate products of cobalt metallurgy; cobalt and articles thereof, including waste and scrap, other than those classified in 8105.20 and 8105.30.

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

## What it doesn’t cover

Other goods of heading 81.05 are classified under 8105.20 (cobalt mattes or other intermediate products of cobalt metallurgy; unwrought cobalt; powders) and 8105.30 (waste and scrap).

- [8105.20](https://border.bot/hs-codes/810520) Cobalt mattes and other intermediate products of cobalt metallurgy; unwrought cobalt; powders
- [8105.30](https://border.bot/hs-codes/810530) Waste and scrap

## How it is structured

8105.90 is a six-digit subheading. Its first two digits, 81, are the chapter; the first four, 8105, are heading 81.05; the last two, 90, identify the subheading within the heading.

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

- Chapter 81: Other base metals; cermets; articles thereof
- Heading 81.05: Cobalt mattes and other intermediate products of cobalt metallurgy; cobalt and articles thereof, including waste and scrap
- Subheading 8105.90: Other

## In other countries

National tariff lines under 8105.90 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/810590): 1 line, used by 1 other country

- Previous subheading: [8105.30](https://border.bot/hs-codes/810530) Waste and scrap
- Next subheading: [8106.10](https://border.bot/hs-codes/810610) Containing more than 99.99 % of bismuth, by weight

## Frequently asked questions

### What does HS code 8105.90 cover?

HS code 8105.90 covers cobalt mattes and other intermediate products of cobalt metallurgy; cobalt and articles thereof, including waste and scrap, other than those classified in 8105.20 and 8105.30.

### Which heading and chapter is HS code 8105.90 in?

HS code 8105.90 is in heading 81.05 (cobalt mattes and other intermediate products of cobalt metallurgy; cobalt and articles thereof, including waste and scrap) in chapter 81 (other base metals; cermets; articles thereof).

### Where are goods of heading 81.05 classified when 8105.90 doesn’t fit?

Other goods of heading 81.05 are classified under 8105.20 (cobalt mattes or other intermediate products of cobalt metallurgy; unwrought cobalt; powders) and 8105.30 (waste and scrap).

### Which countries’ tariffs list national lines under HS code 8105.90?

National tariff lines under 8105.90 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/810590.json