# United States tariff line 3810.90.20.00: Consisting wholly of inorganic substances

> In the United States tariff, line 3810.90.20.00 covers consisting wholly of inorganic substances. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 3810.90 in heading 38.10 (chapter 38).

Source: https://border.bot/countries/united-states/hs-codes/3810902000
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 38](https://border.bot/countries/united-states/hs-codes/38) / [3810.90](https://border.bot/countries/united-states/hs-codes/381090) / [3810.90.20.00](https://border.bot/countries/united-states/hs-codes/3810902000)

## Key facts

- Tariff line: 3810.90.20.00
- Covers: Consisting wholly of inorganic substances
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [3810.90](https://border.bot/hs-codes/381090)

## What this line covers

In the United States tariff, line 3810.90.20.00 covers consisting wholly of inorganic substances.

Its legal text is “Consisting wholly of inorganic substances”, read under “Other”.

## How it is structured

It falls under HS subheading 3810.90 in heading 38.10 (chapter 38). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 38: Miscellaneous chemical products
- Heading 38.10: Pickling preparations for metal surfaces; fluxes and other auxiliary preparations for soldering, brazing or welding; soldering, brazing or welding powders and pastes consisting of metal and other materials; preparations of a kind used as cores or coatings for welding electrodes or rods
- Subheading 3810.90: Other
- Line 3810.90.20.00: Consisting wholly of inorganic substances

## 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 3810.90 yet.

- [The Harmonized System text for 3810.90](https://border.bot/hs-codes/381090)

## Other lines under 3810.90

- [3810.90.10.00](https://border.bot/countries/united-states/hs-codes/3810901000) Containing 5 percent or more by weight of one or more aromatic or modified aromatic substances
- [3810.90.50.00](https://border.bot/countries/united-states/hs-codes/3810905000) Other

- Previous line: [3810.90.10.00](https://border.bot/countries/united-states/hs-codes/3810901000) Containing 5 percent or more by weight of one or more aromatic or modified aromatic substances
- Next line: [3810.90.50.00](https://border.bot/countries/united-states/hs-codes/3810905000) Other

## Frequently asked questions

### What does tariff line 3810.90.20.00 cover in the United States tariff?

In the United States tariff, line 3810.90.20.00 covers consisting wholly of inorganic substances.

### What is the general (MFN) duty on 3810.90.20.00 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/3810902000.json