# HS 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 > HS heading 31.05 covers 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. It is in chapter 31 (fertilisers). It is split into 8 subheadings: 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)), 3105.40 (ammonium dihydrogenorthophosphate (monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (diammonium phosphate)), 3105.51 (other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus, containing nitrates and phosphates), 3105.59 (other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus, other) and 2 others. National tariff lines under heading 31.05 are live on border.bot for the United States (10 lines, also used by 1 other country). Source: https://border.bot/hs-codes/3105 Last updated: 11 October 2026 [HS codes](https://border.bot/hs-codes) / [Chapter 31](https://border.bot/hs-codes/31) / [31.05](https://border.bot/hs-codes/3105) ## Key facts - Heading: 31.05 - Description: 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 - Chapter: 31: Fertilisers - Subheadings: 8 - Edition: HS2022 ## What this code covers HS heading 31.05 covers 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. It is split into 8 subheadings: 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)), 3105.40 (ammonium dihydrogenorthophosphate (monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (diammonium phosphate)), 3105.51 (other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus, containing nitrates and phosphates), 3105.59 (other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus, other) and 2 others. - [3105.10](https://border.bot/hs-codes/310510) Goods of this Chapter in tablets or similar forms or in packages of a gross weight not exceeding 10kg - [3105.20](https://border.bot/hs-codes/310520) Mineral or chemical fertilisers containing the three fertilising elements nitrogen, phosphorus and potassium - [3105.30](https://border.bot/hs-codes/310530) Diammonium hydrogenorthophosphate (diammonium phosphate) - [3105.40](https://border.bot/hs-codes/310540) Ammonium dihydrogenorthophosphate (monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (diammonium phosphate) - [3105.51](https://border.bot/hs-codes/310551) Other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus: Containing nitrates and phosphates - [3105.59](https://border.bot/hs-codes/310559) Other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus: Other - [3105.60](https://border.bot/hs-codes/310560) Mineral or chemical fertilisers containing the two fertilising elements phosphorus and potassium - [3105.90](https://border.bot/hs-codes/310590) Other ## What it doesn’t cover Other goods of chapter 31 are classified in its other 4 headings, listed below. - [31.01](https://border.bot/hs-codes/3101) Animal or vegetable fertilisers, whether or not mixed together or chemically treated; fertilisers produced by the mixing or chemical treatment of animal or vegetable products - [31.02](https://border.bot/hs-codes/3102) Mineral or chemical fertilisers, nitrogenous - [31.03](https://border.bot/hs-codes/3103) Mineral or chemical fertilisers, phosphatic - [31.04](https://border.bot/hs-codes/3104) Mineral or chemical fertilisers, potassic ## How it is structured Heading 31.05 is one of 5 headings in chapter 31. Its first two digits, 31, are the chapter; the next two, 05, number the heading within it. Its subheadings add two more digits (3105.10, 3105.20, 3105.30). ## In other countries National tariff lines under heading 31.05 are live on border.bot for the United States (10 lines, also used by 1 other country). - [United States](https://border.bot/countries/united-states/hs-codes/31): 10 lines, used by 1 other country - Previous heading: [31.04](https://border.bot/hs-codes/3104) Mineral or chemical fertilisers, potassic - Next heading: [32.01](https://border.bot/hs-codes/3201) Tanning extracts of vegetable origin; tannins and their salts, ethers, esters and other derivatives ## Frequently asked questions ### What does HS heading 31.05 cover? HS heading 31.05 covers 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. ### Which chapter is HS heading 31.05 in? HS heading 31.05 is in chapter 31 (fertilisers). ### How many subheadings does HS heading 31.05 have? HS heading 31.05 has 8 subheadings: 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)), 3105.40 (ammonium dihydrogenorthophosphate (monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (diammonium phosphate)), 3105.51 (other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus, containing nitrates and phosphates), 3105.59 (other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus, other) and 2 others. ### Which countries’ tariffs list national lines under HS heading 31.05? National tariff lines under heading 31.05 are live on border.bot for the United States (10 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/3105.json