# United States tariff lines under HS 3105.51

> The United States tariff splits HS 3105.51 (other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus: Containing nitrates and phosphates) into 1 national line: 3105.51.00.00 (containing nitrates and phosphates). Every United States line under 3105.51 is free of general (MFN) duty.

Source: https://border.bot/countries/united-states/hs-codes/310551
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) / [3105.51](https://border.bot/countries/united-states/hs-codes/310551)

## Key facts

- HS subheading: [3105.51](https://border.bot/hs-codes/310551)
- Duty (MFN): Free
- National lines: 1
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 31: Fertilisers

## United States lines under 3105.51

The United States tariff splits HS 3105.51 (other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus: Containing nitrates and phosphates) into 1 national line: 3105.51.00.00 (containing nitrates and phosphates).

Every United States line under 3105.51 is free of general (MFN) duty.

- [3105.51.00.00](https://border.bot/countries/united-states/hs-codes/3105510000) Other mineral or chemical fertilizers containing the two fertilizing elements nitrogen and phosphorus, Containing nitrates and phosphates. Duty (MFN): free

## In other countries

No other national tariff on border.bot has live lines under 3105.51 yet.

- [The Harmonized System text for 3105.51](https://border.bot/hs-codes/310551)

- Previous subheading: [3105.40](https://border.bot/countries/united-states/hs-codes/310540) 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
- Next subheading: [3105.59](https://border.bot/countries/united-states/hs-codes/310559) 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

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 3105.51?

The United States tariff splits HS 3105.51 (other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus: Containing nitrates and phosphates) into 1 national line: 3105.51.00.00 (containing nitrates and phosphates).

### What is the duty on HS 3105.51 in the United States?

Every United States line under 3105.51 is free of general (MFN) duty.

## 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/310551.json