# HS code 7903.10: Zinc dust

> HS code 7903.10 covers zinc dust. It sits in heading 79.03 (zinc dust, powders and flakes) in chapter 79 (zinc and articles thereof). Other goods of heading 79.03 are classified under 7903.90 (other). National tariff lines under 7903.10 are live on border.bot for the United States (1 line, also used by 1 other country).

Source: https://border.bot/hs-codes/790310
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 79](https://border.bot/hs-codes/79) / [79.03](https://border.bot/hs-codes/7903) / [7903.10](https://border.bot/hs-codes/790310)

## Key facts

- HS code: 7903.10
- Covers: Zinc dust
- Heading: [79.03: Zinc dust, powders and flakes](https://border.bot/hs-codes/7903)
- Chapter: [79: Zinc and articles thereof](https://border.bot/hs-codes/79)
- Edition: HS2022
- Duty in the United States: [See its 1 line](https://border.bot/countries/united-states/hs-codes/790310)

## What this code covers

HS code 7903.10 covers zinc dust.

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

## What it doesn’t cover

Other goods of heading 79.03 are classified under 7903.90 (other).

- [7903.90](https://border.bot/hs-codes/790390) Other

## How it is structured

7903.10 is a six-digit subheading. Its first two digits, 79, are the chapter; the first four, 7903, are heading 79.03; the last two, 10, identify the subheading within the heading.

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

- Chapter 79: Zinc and articles thereof
- Heading 79.03: Zinc dust, powders and flakes
- Subheading 7903.10: Zinc dust

## In other countries

National tariff lines under 7903.10 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/790310): 1 line, used by 1 other country

- Previous subheading: [7902.00](https://border.bot/hs-codes/790200) Zinc waste and scrap
- Next subheading: [7903.90](https://border.bot/hs-codes/790390) Other

## Frequently asked questions

### What does HS code 7903.10 cover?

HS code 7903.10 covers zinc dust.

### Which heading and chapter is HS code 7903.10 in?

HS code 7903.10 is in heading 79.03 (zinc dust, powders and flakes) in chapter 79 (zinc and articles thereof).

### Where are goods of heading 79.03 classified when 7903.10 doesn’t fit?

Other goods of heading 79.03 are classified under 7903.90 (other).

### Which countries’ tariffs list national lines under HS code 7903.10?

National tariff lines under 7903.10 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/790310.json