# HS chapter 31: Fertilisers > HS chapter 31 covers fertilisers. It has 5 headings, 31.01 to 31.05, and 24 six-digit subheadings in HS2022. National tariff lines under chapter 31 are live on border.bot for the United States (29 lines, also used by 1 other country). Source: https://border.bot/hs-codes/31 Last updated: 11 October 2026 [HS codes](https://border.bot/hs-codes) / [Chapter 31](https://border.bot/hs-codes/31) ## Key facts - Chapter: 31 - Description: Fertilisers - Headings: 5 - Subheadings: 24 - Edition: HS2022 ## What this chapter covers HS chapter 31 covers fertilisers. It has 5 headings, 31.01 to 31.05, and 24 six-digit subheadings in HS2022. ### [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 - [3101.00](https://border.bot/hs-codes/310100) 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 - [3102.10](https://border.bot/hs-codes/310210) Urea, whether or not in aqueous solution - [3102.21](https://border.bot/hs-codes/310221) Ammonium sulphate; double salts and mixtures of ammonium sulphate and ammonium nitrate: Ammonium sulphate - [3102.29](https://border.bot/hs-codes/310229) Ammonium sulphate; double salts and mixtures of ammonium sulphate and ammonium nitrate: Other - [3102.30](https://border.bot/hs-codes/310230) Ammonium nitrate, whether or not in aqueous solution - [3102.40](https://border.bot/hs-codes/310240) Mixtures of ammonium nitrate with calcium carbonate or other inorganic non-fertilising substances - [3102.50](https://border.bot/hs-codes/310250) Sodium nitrate - [3102.60](https://border.bot/hs-codes/310260) Double salts and mixtures of calcium nitrate and ammonium nitrate - [3102.80](https://border.bot/hs-codes/310280) Mixtures of urea and ammonium nitrate in aqueous or ammoniacal solution - [3102.90](https://border.bot/hs-codes/310290) Other, including mixtures not specified in the foregoing subheadings ### [31.03](https://border.bot/hs-codes/3103) Mineral or chemical fertilisers, phosphatic - [3103.11](https://border.bot/hs-codes/310311) Superphosphates: Containing by weight 35 % or more of diphosphorus pentaoxide (P2O5) - [3103.19](https://border.bot/hs-codes/310319) Superphosphates: Other - [3103.90](https://border.bot/hs-codes/310390) Other ### [31.04](https://border.bot/hs-codes/3104) Mineral or chemical fertilisers, potassic - [3104.20](https://border.bot/hs-codes/310420) Potassium chloride - [3104.30](https://border.bot/hs-codes/310430) Potassium sulphate - [3104.90](https://border.bot/hs-codes/310490) Other ### [31.05](https://border.bot/hs-codes/3105) 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 - [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 Chapter 30, before it, covers pharmaceutical products; chapter 32, after it, covers tanning or dyeing extracts; tannins and their derivatives; dyes, pigments and other colouring matter; paints and varnishes; putty and other mastics; inks. ## How it is structured Chapter 31 is the first level of the Harmonized System. Its headings add two digits to the chapter number (31.01), and each heading's subheadings add two more. ## In other countries National tariff lines under chapter 31 are live on border.bot for the United States (29 lines, also used by 1 other country). - [United States](https://border.bot/countries/united-states/hs-codes/31): 29 lines, used by 1 other country - Previous chapter: [30](https://border.bot/hs-codes/30) Pharmaceutical products - Next chapter: [32](https://border.bot/hs-codes/32) Tanning or dyeing extracts; tannins and their derivatives; dyes, pigments and other colouring matter; paints and varnishes; putty and other mastics; inks ## Frequently asked questions ### What does HS chapter 31 cover? HS chapter 31 covers fertilisers. ### How many headings and subheadings are in HS chapter 31? HS chapter 31 has 5 headings and 24 six-digit subheadings in HS2022. ### Which countries’ tariffs list national lines in HS chapter 31? National tariff lines under chapter 31 are live on border.bot for the United States (29 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/31.json