# United States tariff line 3105.40.00.50: Other

> In the United States tariff, line 3105.40.00.50 covers ammonium dihydrogenorthophosphate (Monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (Diammonium phosphate). Goods under this line enter free of general (MFN) duty. It falls under HS subheading 3105.40 in heading 31.05 (chapter 31).

Source: https://border.bot/countries/united-states/hs-codes/3105400050
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 31](https://border.bot/countries/united-states/hs-codes/31) / [3105.40](https://border.bot/countries/united-states/hs-codes/310540) / [3105.40.00.50](https://border.bot/countries/united-states/hs-codes/3105400050)

## Key facts

- Tariff line: 3105.40.00.50
- Covers: Ammonium dihydrogenorthophosphate (Monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (Diammonium phosphate)
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [3105.40](https://border.bot/hs-codes/310540)

## What this line covers

In the United States tariff, line 3105.40.00.50 covers ammonium dihydrogenorthophosphate (Monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (Diammonium phosphate).

Its legal text is “Other”, read under “Ammonium dihydrogenorthophosphate (Monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (Diammonium phosphate)”.

## How it is structured

It falls under HS subheading 3105.40 in heading 31.05 (chapter 31). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 31: Fertilisers
- Heading 31.05: Mineral or chemical fertilizers containing two or three of the fertilizing elements nitrogen, phosphorus and potassium; other fertilizers; goods of this chapter in tablets or similar forms or in packages of a gross weight not exceeding 10 kg
- Subheading 3105.40: Ammonium dihydrogenorthophosphate (Monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (Diammonium phosphate)
- Line 3105.40.00.50: Other

## Duty

Goods under this line enter free of general (MFN) duty.

The rate is published on 3105.40.00.

## In other countries

No other national tariff on border.bot has live lines under 3105.40 yet.

- [The Harmonized System text for 3105.40](https://border.bot/hs-codes/310540)

## Other lines under 3105.40

- [3105.40.00.10](https://border.bot/countries/united-states/hs-codes/3105400010) Ammonium dihydrogenorthophosphate (Monoammonium phosphate)

- Previous line: [3105.40.00.10](https://border.bot/countries/united-states/hs-codes/3105400010) Ammonium dihydrogenorthophosphate (Monoammonium phosphate)
- Next line: [3105.51.00.00](https://border.bot/countries/united-states/hs-codes/3105510000) Containing nitrates and phosphates

## Frequently asked questions

### What does tariff line 3105.40.00.50 cover in the United States tariff?

In the United States tariff, line 3105.40.00.50 covers ammonium dihydrogenorthophosphate (Monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (Diammonium phosphate).

### What is the general (MFN) duty on 3105.40.00.50 in the United States?

Goods under this line enter free of general (MFN) duty. The rate is published on 3105.40.00.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 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.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/3105400050.json