# 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).

Source: https://staging.border.bot/hs-codes/810590
Last updated: 13 October 2026

[HS codes](https://staging.border.bot/hs-codes) / [Chapter 81](https://staging.border.bot/hs-codes/81) / [81.05](https://staging.border.bot/hs-codes/8105) / [8105.90](https://staging.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://staging.border.bot/hs-codes/8105)
- Chapter: [81: Other base metals; cermets; articles thereof](https://staging.border.bot/hs-codes/81)
- Edition: HS2022
- Duty rates: [Set by each country’s tariff](https://staging.border.bot/countries)

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

No national tariff lines under 8105.90 are live on border.bot yet. Tariffs built on the Harmonized System (HS2022) use 8105.90 at six digits and add their own digits after it.

- Previous subheading: [8105.30](https://staging.border.bot/hs-codes/810530) Waste and scrap
- Next subheading: [8106.10](https://staging.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).

## 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/810590.json