# United States tariff line 2519.90.50.00: Other

> In the United States tariff, line 2519.90.50.00 covers natural magnesium carbonate (magnesite); fused magnesia; dead-burned (sintered) magnesia, whether or not containing small quantities of other oxides added before sintering; other magnesium oxide, whether or not pure. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 2519.90 in heading 25.19 (chapter 25).

Source: https://border.bot/countries/united-states/hs-codes/2519905000
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 25](https://border.bot/countries/united-states/hs-codes/25) / [2519.90](https://border.bot/countries/united-states/hs-codes/251990) / [2519.90.50.00](https://border.bot/countries/united-states/hs-codes/2519905000)

## Key facts

- Tariff line: 2519.90.50.00
- Covers: Natural magnesium carbonate (magnesite); fused magnesia; dead-burned (sintered) magnesia, whether or not containing small quantities of other oxides added before sintering; other magnesium oxide, whether or not pure
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [2519.90](https://border.bot/hs-codes/251990)

## What this line covers

In the United States tariff, line 2519.90.50.00 covers natural magnesium carbonate (magnesite); fused magnesia; dead-burned (sintered) magnesia, whether or not containing small quantities of other oxides added before sintering; other magnesium oxide, whether or not pure.

Its legal text is “Other”, read under “Other”.

## How it is structured

It falls under HS subheading 2519.90 in heading 25.19 (chapter 25). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 25: Salt; sulphur; earths and stone; plastering materials, lime and cement
- Heading 25.19: Natural magnesium carbonate (magnesite); fused magnesia; dead-burned (sintered) magnesia, whether or not containing small quantities of other oxides added before sintering; other magnesium oxide, whether or not pure
- Subheading 2519.90: Other
- Line 2519.90.50.00: Other

## Duty

Goods under this line enter free of general (MFN) duty.

## In other countries

No other national tariff on border.bot has live lines under 2519.90 yet.

- [The Harmonized System text for 2519.90](https://border.bot/hs-codes/251990)

## Other lines under 2519.90

- [2519.90.10.00](https://border.bot/countries/united-states/hs-codes/2519901000) Fused magnesia and dead-burned (sintered) magnesia
- [2519.90.20.00](https://border.bot/countries/united-states/hs-codes/2519902000) Caustic calcined magnesite

- Previous line: [2519.90.20.00](https://border.bot/countries/united-states/hs-codes/2519902000) Caustic calcined magnesite
- Next line: [2520.10.00.00](https://border.bot/countries/united-states/hs-codes/2520100000) Gypsum; anhydrite

## Frequently asked questions

### What does tariff line 2519.90.50.00 cover in the United States tariff?

In the United States tariff, line 2519.90.50.00 covers natural magnesium carbonate (magnesite); fused magnesia; dead-burned (sintered) magnesia, whether or not containing small quantities of other oxides added before sintering; other magnesium oxide, whether or not pure.

### What is the general (MFN) duty on 2519.90.50.00 in the United States?

Goods under this line enter free of general (MFN) duty.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 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.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/2519905000.json