# HS code 3606.90: Ferro-cerium and other pyrophoric alloys in all forms; articles of combustible materials as specified in Note 2 to this Chapter

> HS code 3606.90 covers ferro-cerium and other pyrophoric alloys in all forms; articles of combustible materials as specified in Note 2 to this Chapter, other than those classified in 3606.10. It sits in heading 36.06 (ferro-cerium and other pyrophoric alloys in all forms; articles of combustible materials as specified in Note 2 to this Chapter) in chapter 36 (explosives; pyrotechnic products; matches; pyrophoric alloys; certain combustible preparations). Other goods of heading 36.06 are classified under 3606.10 (liquid or liquefied-gas fuels in containers of a kind used for filling or refilling cigarette or similar lighters or of a capacity not exceeding 300 cm3). National tariff lines under 3606.90 are live on border.bot for the United States (3 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/360690
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 36](https://border.bot/hs-codes/36) / [36.06](https://border.bot/hs-codes/3606) / [3606.90](https://border.bot/hs-codes/360690)

## Key facts

- HS code: 3606.90
- Covers: Ferro-cerium and other pyrophoric alloys in all forms; articles of combustible materials as specified in Note 2 to this Chapter
- Heading: [36.06: Ferro-cerium and other pyrophoric alloys in all forms; articles of combustible materials as specified in Note 2 to this Chapter](https://border.bot/hs-codes/3606)
- Chapter: [36: Explosives; pyrotechnic products; matches; pyrophoric alloys; certain combustible preparations](https://border.bot/hs-codes/36)
- Edition: HS2022
- Duty in the United States: [See its 3 lines](https://border.bot/countries/united-states/hs-codes/360690)

## What this code covers

HS code 3606.90 covers ferro-cerium and other pyrophoric alloys in all forms; articles of combustible materials as specified in Note 2 to this Chapter, other than those classified in 3606.10.

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

## What it doesn’t cover

Other goods of heading 36.06 are classified under 3606.10 (liquid or liquefied-gas fuels in containers of a kind used for filling or refilling cigarette or similar lighters or of a capacity not exceeding 300 cm3).

- [3606.10](https://border.bot/hs-codes/360610) Liquid or liquefied-gas fuels in containers of a kind used for filling or refilling cigarette or similar lighters and of a capacity not exceeding 300 cm3

## How it is structured

3606.90 is a six-digit subheading. Its first two digits, 36, are the chapter; the first four, 3606, are heading 36.06; the last two, 90, identify the subheading within the heading.

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

- Chapter 36: Explosives; pyrotechnic products; matches; pyrophoric alloys; certain combustible preparations
- Heading 36.06: Ferro-cerium and other pyrophoric alloys in all forms; articles of combustible materials as specified in Note 2 to this Chapter
- Subheading 3606.90: Other

## In other countries

National tariff lines under 3606.90 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/360690): 3 lines, used by 1 other country

- Previous subheading: [3606.10](https://border.bot/hs-codes/360610) Liquid or liquefied-gas fuels in containers of a kind used for filling or refilling cigarette or similar lighters and of a capacity not exceeding 300 cm3
- Next subheading: [3701.10](https://border.bot/hs-codes/370110) For X-ray

## Frequently asked questions

### What does HS code 3606.90 cover?

HS code 3606.90 covers ferro-cerium and other pyrophoric alloys in all forms; articles of combustible materials as specified in Note 2 to this Chapter, other than those classified in 3606.10.

### Which heading and chapter is HS code 3606.90 in?

HS code 3606.90 is in heading 36.06 (ferro-cerium and other pyrophoric alloys in all forms; articles of combustible materials as specified in Note 2 to this Chapter) in chapter 36 (explosives; pyrotechnic products; matches; pyrophoric alloys; certain combustible preparations).

### Where are goods of heading 36.06 classified when 3606.90 doesn’t fit?

Other goods of heading 36.06 are classified under 3606.10 (liquid or liquefied-gas fuels in containers of a kind used for filling or refilling cigarette or similar lighters or of a capacity not exceeding 300 cm3).

### Which countries’ tariffs list national lines under HS code 3606.90?

National tariff lines under 3606.90 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/360690.json