# HS code 2912.50: Cyclic polymers of aldehydes

> HS code 2912.50 covers cyclic polymers of aldehydes. It sits in heading 29.12 (aldehydes, whether or not with other oxygen function; cyclic polymers of aldehydes; paraformaldehyde) in chapter 29 (organic chemicals). Other goods of heading 29.12 are classified under 2912.11 (acyclic aldehydes without other oxygen function, methanal (formaldehyde)), 2912.12 (acyclic aldehydes without other oxygen function, ethanal (acetaldehyde)), 2912.19 (acyclic aldehydes without other oxygen function, other), 2912.21 (cyclic aldehydes without other oxygen function, benzaldehyde) or 5 others. National tariff lines under 2912.50 are live on border.bot for the United States (2 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/291250
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 29](https://border.bot/hs-codes/29) / [29.12](https://border.bot/hs-codes/2912) / [2912.50](https://border.bot/hs-codes/291250)

## Key facts

- HS code: 2912.50
- Covers: Cyclic polymers of aldehydes
- Heading: [29.12: Aldehydes, whether or not with other oxygen function; cyclic polymers of aldehydes; paraformaldehyde](https://border.bot/hs-codes/2912)
- Chapter: [29: Organic chemicals](https://border.bot/hs-codes/29)
- Edition: HS2022
- Duty in the United States: [See its 2 lines](https://border.bot/countries/united-states/hs-codes/291250)

## What this code covers

HS code 2912.50 covers cyclic polymers of aldehydes.

The legal text of the subheading is “Cyclic polymers of aldehydes”, in HS2022.

## What it doesn’t cover

Other goods of heading 29.12 are classified under 2912.11 (acyclic aldehydes without other oxygen function, methanal (formaldehyde)), 2912.12 (acyclic aldehydes without other oxygen function, ethanal (acetaldehyde)), 2912.19 (acyclic aldehydes without other oxygen function, other), 2912.21 (cyclic aldehydes without other oxygen function, benzaldehyde) or 5 others.

- [2912.11](https://border.bot/hs-codes/291211) Acyclic aldehydes without other oxygen function: Methanal (formaldehyde)
- [2912.12](https://border.bot/hs-codes/291212) Acyclic aldehydes without other oxygen function: Ethanal (acetaldehyde)
- [2912.19](https://border.bot/hs-codes/291219) Acyclic aldehydes without other oxygen function: Other
- [2912.21](https://border.bot/hs-codes/291221) Cyclic aldehydes without other oxygen function: Benzaldehyde
- [2912.29](https://border.bot/hs-codes/291229) Cyclic aldehydes without other oxygen function: Other
- [2912.41](https://border.bot/hs-codes/291241) Aldehyde-alcohols, aldehyde-ethers, aldehyde-phenols and aldehydes with other oxygen function: Vanillin (4-hydroxy-3-methoxybenzaldehyde)
- [2912.42](https://border.bot/hs-codes/291242) Aldehyde-alcohols, aldehyde-ethers, aldehyde-phenols and aldehydes with other oxygen function: Ethylvanillin (3-ethoxy-4-hydroxybenzaldehyde)
- [2912.49](https://border.bot/hs-codes/291249) Aldehyde-alcohols, aldehyde-ethers, aldehyde-phenols and aldehydes with other oxygen function: Other
- [2912.60](https://border.bot/hs-codes/291260) Paraformaldehyde

## How it is structured

2912.50 is a six-digit subheading. Its first two digits, 29, are the chapter; the first four, 2912, are heading 29.12; the last two, 50, identify the subheading within the heading.

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

- Chapter 29: Organic chemicals
- Heading 29.12: Aldehydes, whether or not with other oxygen function; cyclic polymers of aldehydes; paraformaldehyde
- Subheading 2912.50: Cyclic polymers of aldehydes

## In other countries

National tariff lines under 2912.50 are live on border.bot for the United States (2 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/291250): 2 lines, used by 1 other country

- Previous subheading: [2912.49](https://border.bot/hs-codes/291249) Aldehyde-alcohols, aldehyde-ethers, aldehyde-phenols and aldehydes with other oxygen function: Other
- Next subheading: [2912.60](https://border.bot/hs-codes/291260) Paraformaldehyde

## Frequently asked questions

### What does HS code 2912.50 cover?

HS code 2912.50 covers cyclic polymers of aldehydes.

### Which heading and chapter is HS code 2912.50 in?

HS code 2912.50 is in heading 29.12 (aldehydes, whether or not with other oxygen function; cyclic polymers of aldehydes; paraformaldehyde) in chapter 29 (organic chemicals).

### Where are goods of heading 29.12 classified when 2912.50 doesn’t fit?

Other goods of heading 29.12 are classified under 2912.11 (acyclic aldehydes without other oxygen function, methanal (formaldehyde)), 2912.12 (acyclic aldehydes without other oxygen function, ethanal (acetaldehyde)), 2912.19 (acyclic aldehydes without other oxygen function, other), 2912.21 (cyclic aldehydes without other oxygen function, benzaldehyde) or 5 others.

### Which countries’ tariffs list national lines under HS code 2912.50?

National tariff lines under 2912.50 are live on border.bot for the United States (2 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/291250.json