HS code 3105.40: Ammonium dihydrogenorthophosphate (monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (diammonium phosphate)
Last updated
Key facts
- HS code
- 3105.40
- Covers
- Ammonium dihydrogenorthophosphate (monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (diammonium phosphate)
- Chapter
- 31: Fertilisers
- Edition
- HS2022
- Duty in the United States
- See its 2 lines
Summary
HS code 3105.40 covers ammonium dihydrogenorthophosphate (monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (diammonium phosphate). It sits in heading 31.05 (mineral or chemical fertilisers containing two or three of the fertilising elements nitrogen, phosphorus and potassium; other fertilisers; goods of this Chapter in tablets or similar forms or in packages of a gross weight not exceeding 10kg) in chapter 31 (fertilisers). Other goods of heading 31.05 are classified under 3105.10 (goods of this Chapter in tablets or similar forms or in packages of a gross weight not exceeding 10kg), 3105.20 (mineral or chemical fertilisers containing the three fertilising elements nitrogen, phosphorus and potassium), 3105.30 (diammonium hydrogenorthophosphate (diammonium phosphate)), 3105.51 (other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus, containing nitrates or phosphates) and 3 others. National tariff lines under 3105.40 are live on border.bot for the United States (2 lines, also used by 1 other country).
What this code covers
HS code 3105.40 covers ammonium dihydrogenorthophosphate (monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (diammonium phosphate).
The legal text of the subheading is “Ammonium dihydrogenorthophosphate (monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (diammonium phosphate)”, in HS2022.
What it doesn’t cover
Other goods of heading 31.05 are classified under 3105.10 (goods of this Chapter in tablets or similar forms or in packages of a gross weight not exceeding 10kg), 3105.20 (mineral or chemical fertilisers containing the three fertilising elements nitrogen, phosphorus and potassium), 3105.30 (diammonium hydrogenorthophosphate (diammonium phosphate)), 3105.51 (other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus, containing nitrates or phosphates) and 3 others.
- 3105.10Goods of this Chapter in tablets or similar forms or in packages of a gross weight not exceeding 10kg
- 3105.20Mineral or chemical fertilisers containing the three fertilising elements nitrogen, phosphorus and potassium
- 3105.30Diammonium hydrogenorthophosphate (diammonium phosphate)
- 3105.51Other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus: Containing nitrates and phosphates
- 3105.59Other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus: Other
- 3105.60Mineral or chemical fertilisers containing the two fertilising elements phosphorus and potassium
- 3105.90Other
How it is structured
3105.40 is a six-digit subheading. Its first two digits, 31, are the chapter; the first four, 3105, are heading 31.05; the last two, 40, identify the subheading within the heading.
Countries add their own digits after these six for their national tariff lines.
- Chapter 31
- Fertilisers
- Subheading 3105.40
- Ammonium dihydrogenorthophosphate (monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (diammonium phosphate)
In other countries
National tariff lines under 3105.40 are live on border.bot for the United States (2 lines, also used by 1 other country).
- United States2 lines, used by 1 other country
Frequently asked questions
What does HS code 3105.40 cover?
HS code 3105.40 covers ammonium dihydrogenorthophosphate (monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (diammonium phosphate).
Which heading and chapter is HS code 3105.40 in?
HS code 3105.40 is in heading 31.05 (mineral or chemical fertilisers containing two or three of the fertilising elements nitrogen, phosphorus and potassium; other fertilisers; goods of this Chapter in tablets or similar forms or in packages of a gross weight not exceeding 10kg) in chapter 31 (fertilisers).
Where are goods of heading 31.05 classified when 3105.40 doesn’t fit?
Other goods of heading 31.05 are classified under 3105.10 (goods of this Chapter in tablets or similar forms or in packages of a gross weight not exceeding 10kg), 3105.20 (mineral or chemical fertilisers containing the three fertilising elements nitrogen, phosphorus and potassium), 3105.30 (diammonium hydrogenorthophosphate (diammonium phosphate)), 3105.51 (other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus, containing nitrates or phosphates) and 3 others.
Which countries’ tariffs list national lines under HS code 3105.40?
National tariff lines under 3105.40 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.