# HS code 8506.30: Mercuric oxide

> HS code 8506.30 covers mercuric oxide. It sits in heading 85.06 (primary cells and primary batteries) in chapter 85 (electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles). Other goods of heading 85.06 are classified under 8506.10 (manganese dioxide), 8506.40 (silver oxide), 8506.50 (lithium), 8506.60 (air-zinc) or 2 others.

Source: https://staging.border.bot/hs-codes/850630
Last updated: 13 October 2026

[HS codes](https://staging.border.bot/hs-codes) / [Chapter 85](https://staging.border.bot/hs-codes/85) / [85.06](https://staging.border.bot/hs-codes/8506) / [8506.30](https://staging.border.bot/hs-codes/850630)

## Key facts

- HS code: 8506.30
- Covers: Mercuric oxide
- Heading: [85.06: Primary cells and primary batteries](https://staging.border.bot/hs-codes/8506)
- Chapter: [85: Electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles](https://staging.border.bot/hs-codes/85)
- Edition: HS2022
- Duty rates: [Set by each country’s tariff](https://staging.border.bot/countries)

## What this code covers

HS code 8506.30 covers mercuric oxide.

The legal text of the subheading is “Mercuric oxide”, in HS2022.

## What it doesn’t cover

Other goods of heading 85.06 are classified under 8506.10 (manganese dioxide), 8506.40 (silver oxide), 8506.50 (lithium), 8506.60 (air-zinc) or 2 others.

- [8506.10](https://staging.border.bot/hs-codes/850610) Manganese dioxide
- [8506.40](https://staging.border.bot/hs-codes/850640) Silver oxide
- [8506.50](https://staging.border.bot/hs-codes/850650) Lithium
- [8506.60](https://staging.border.bot/hs-codes/850660) Air-zinc
- [8506.80](https://staging.border.bot/hs-codes/850680) Other primary cells and primary batteries
- [8506.90](https://staging.border.bot/hs-codes/850690) Parts

## How it is structured

8506.30 is a six-digit subheading. Its first two digits, 85, are the chapter; the first four, 8506, are heading 85.06; the last two, 30, identify the subheading within the heading.

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

- Chapter 85: Electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles
- Heading 85.06: Primary cells and primary batteries
- Subheading 8506.30: Mercuric oxide

## In other countries

No national tariff lines under 8506.30 are live on border.bot yet. Tariffs built on the Harmonized System (HS2022) use 8506.30 at six digits and add their own digits after it.

- Previous subheading: [8506.10](https://staging.border.bot/hs-codes/850610) Manganese dioxide
- Next subheading: [8506.40](https://staging.border.bot/hs-codes/850640) Silver oxide

## Frequently asked questions

### What does HS code 8506.30 cover?

HS code 8506.30 covers mercuric oxide.

### Which heading and chapter is HS code 8506.30 in?

HS code 8506.30 is in heading 85.06 (primary cells and primary batteries) in chapter 85 (electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles).

### Where are goods of heading 85.06 classified when 8506.30 doesn’t fit?

Other goods of heading 85.06 are classified under 8506.10 (manganese dioxide), 8506.40 (silver oxide), 8506.50 (lithium), 8506.60 (air-zinc) or 2 others.

## 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/850630.json