# HS code 2920.22: Phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, diethyl phosphite

> HS code 2920.22 covers phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, diethyl phosphite. It sits in heading 29.20 (esters of other inorganic acids of non-metals (excluding esters of hydrogen halides) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives) in chapter 29 (organic chemicals). Other goods of heading 29.20 are classified under 2920.11 (thiophosphoric esters (phosphorothioates) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, parathion (ISO) and parathion-methyl (ISO) (methyl-parathion)), 2920.19 (thiophosphoric esters (phosphorothioates) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, other), 2920.21 (phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, dimethyl phosphite), 2920.23 (phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, trimethyl phosphite) or 4 others. National tariff lines under 2920.22 are live on border.bot for the United States (1 line, also used by 1 other country).

Source: https://border.bot/hs-codes/292022
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 29](https://border.bot/hs-codes/29) / [29.20](https://border.bot/hs-codes/2920) / [2920.22](https://border.bot/hs-codes/292022)

## Key facts

- HS code: 2920.22
- Covers: Phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, diethyl phosphite
- Heading: [29.20: Esters of other inorganic acids of non-metals (excluding esters of hydrogen halides) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives](https://border.bot/hs-codes/2920)
- Chapter: [29: Organic chemicals](https://border.bot/hs-codes/29)
- Edition: HS2022
- Duty in the United States: [See its 1 line](https://border.bot/countries/united-states/hs-codes/292022)

## What this code covers

HS code 2920.22 covers phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, diethyl phosphite.

The legal text of the subheading is “Phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives: Diethyl phosphite”, read under “Phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives”, in HS2022.

## What it doesn’t cover

Other goods of heading 29.20 are classified under 2920.11 (thiophosphoric esters (phosphorothioates) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, parathion (ISO) and parathion-methyl (ISO) (methyl-parathion)), 2920.19 (thiophosphoric esters (phosphorothioates) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, other), 2920.21 (phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, dimethyl phosphite), 2920.23 (phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, trimethyl phosphite) or 4 others.

- [2920.11](https://border.bot/hs-codes/292011) Thiophosphoric esters (phosphorothioates) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives: Parathion (ISO) and parathion-methyl (ISO) (methyl-parathion)
- [2920.19](https://border.bot/hs-codes/292019) Thiophosphoric esters (phosphorothioates) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives: Other
- [2920.21](https://border.bot/hs-codes/292021) Phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives: Dimethyl phosphite
- [2920.23](https://border.bot/hs-codes/292023) Phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives: Trimethyl phosphite
- [2920.24](https://border.bot/hs-codes/292024) Phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives: Triethyl phosphite
- [2920.29](https://border.bot/hs-codes/292029) Phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives: Other
- [2920.30](https://border.bot/hs-codes/292030) Endosulfan (ISO)
- [2920.90](https://border.bot/hs-codes/292090) Other

## How it is structured

2920.22 is a six-digit subheading. Its first two digits, 29, are the chapter; the first four, 2920, are heading 29.20; the last two, 22, identify the subheading within the heading.

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

- Chapter 29: Organic chemicals
- Heading 29.20: Esters of other inorganic acids of non-metals (excluding esters of hydrogen halides) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives
- Within the heading: Phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives
- Subheading 2920.22: Diethyl phosphite

## In other countries

National tariff lines under 2920.22 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/292022): 1 line, used by 1 other country

- Previous subheading: [2920.21](https://border.bot/hs-codes/292021) Phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives: Dimethyl phosphite
- Next subheading: [2920.23](https://border.bot/hs-codes/292023) Phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives: Trimethyl phosphite

## Frequently asked questions

### What does HS code 2920.22 cover?

HS code 2920.22 covers phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, diethyl phosphite.

### Which heading and chapter is HS code 2920.22 in?

HS code 2920.22 is in heading 29.20 (esters of other inorganic acids of non-metals (excluding esters of hydrogen halides) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives) in chapter 29 (organic chemicals).

### Where are goods of heading 29.20 classified when 2920.22 doesn’t fit?

Other goods of heading 29.20 are classified under 2920.11 (thiophosphoric esters (phosphorothioates) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, parathion (ISO) and parathion-methyl (ISO) (methyl-parathion)), 2920.19 (thiophosphoric esters (phosphorothioates) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, other), 2920.21 (phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, dimethyl phosphite), 2920.23 (phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, trimethyl phosphite) or 4 others.

### Which countries’ tariffs list national lines under HS code 2920.22?

National tariff lines under 2920.22 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/292022.json