# HS heading 79.03: Zinc dust, powders and flakes

> HS heading 79.03 covers zinc dust, powders and flakes. It is in chapter 79 (zinc and articles thereof). It is split into 2 subheadings: 7903.10 (zinc dust) and 7903.90 (other). National tariff lines under heading 79.03 are live on border.bot for the United States (3 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/7903
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)

## Key facts

- Heading: 79.03
- Description: Zinc dust, powders and flakes
- Chapter: 79: Zinc and articles thereof
- Subheadings: 2
- Edition: HS2022

## What this code covers

HS heading 79.03 covers zinc dust, powders and flakes.

It is split into 2 subheadings: 7903.10 (zinc dust) and 7903.90 (other).

- [7903.10](https://border.bot/hs-codes/790310) Zinc dust
- [7903.90](https://border.bot/hs-codes/790390) Other

## What it doesn’t cover

Other goods of chapter 79 are classified in its other 5 headings, listed below.

- [79.01](https://border.bot/hs-codes/7901) Unwrought zinc
- [79.02](https://border.bot/hs-codes/7902) Zinc waste and scrap
- [79.04](https://border.bot/hs-codes/7904) Zinc bars, rods, profiles and wire
- [79.05](https://border.bot/hs-codes/7905) Zinc plates, sheets, strip and foil
- [79.07](https://border.bot/hs-codes/7907) Other articles of zinc

## How it is structured

Heading 79.03 is one of 6 headings in chapter 79. Its first two digits, 79, are the chapter; the next two, 03, number the heading within it. Its subheadings add two more digits (7903.10, 7903.90).

## In other countries

National tariff lines under heading 79.03 are live on border.bot for the United States (3 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/79): 3 lines, used by 1 other country

- Previous heading: [79.02](https://border.bot/hs-codes/7902) Zinc waste and scrap
- Next heading: [79.04](https://border.bot/hs-codes/7904) Zinc bars, rods, profiles and wire

## Frequently asked questions

### What does HS heading 79.03 cover?

HS heading 79.03 covers zinc dust, powders and flakes.

### Which chapter is HS heading 79.03 in?

HS heading 79.03 is in chapter 79 (zinc and articles thereof).

### How many subheadings does HS heading 79.03 have?

HS heading 79.03 has 2 subheadings: 7903.10 (zinc dust) and 7903.90 (other).

### Which countries’ tariffs list national lines under HS heading 79.03?

National tariff lines under heading 79.03 are live on border.bot for the United States (3 lines, 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/7903.json