Section 6: Products of the Chemical or Allied Industries
Chapter 31: Chapter 31
28 tariff codes in this chapter
| HTS Code | Description | General Rate |
|---|---|---|
| 3101.00.00 | Animal or vegetable fertilizers, whether or not mixed together or chemically treated; fertilizers pr... | Free |
| 3102 | Mineral or chemical fertilizers, nitrogenous: | — |
| 3102.10.00 | Urea, whether or not in aqueous solution | Free |
| 3102.21.00 | Ammonium sulfate | Free |
| 3102.29.00 | Other | Free |
| 3102.30.00 | Ammonium nitrate, whether or not in aqueous solution | Free |
| 3102.40.00 | Mixtures of ammonium nitrate with calcium carbonate or other inorganic nonfertilizing substances | Free |
| 3102.50.00 | Sodium nitrate | Free |
| 3102.60.00 | Double salts and mixtures of calcium nitrate and ammonium nitrate | Free |
| 3102.80.00 | Mixtures of urea and ammonium nitrate in aqueous or ammoniacal solution | Free |
| 3102.90.01 | Other, including mixtures not specified in the foregoing subheadings | Free |
| 3103 | Mineral or chemical fertilizers, phosphatic: | — |
| 3103.11.00 | Containing by weight 35 percent or more of diphosphorous pentaoxide (P2O5) | Free |
| 3103.19.00 | Other | Free |
| 3103.90.01 | Other | Free |
| 3104 | Mineral or chemical fertilizers, potassic: | — |
| 3104.20.00 | Potassium chloride | Free |
| 3104.30.00 | Potassium sulfate | Free |
| 3104.90.01 | Other | Free |
| 3105 | Mineral or chemical fertilizers containing two or three of the fertilizing elements nitrogen, phosph... | — |
| 3105.10.00 | Products of this chapter in tablets or similar forms or in packages of a gross weight not exceeding ... | Free |
| 3105.20.00 | Mineral or chemical fertilizers containing the three fertilizing elements nitrogen, phosphorus and p... | Free |
| 3105.30.00 | Diammonium hydrogenorthophosphate (Diammonium phosphate) | Free |
| 3105.40.00 | Ammonium dihydrogenorthophosphate (Monoammonium phosphate) and mixtures thereof with diammonium hydr... | Free |
| 3105.51.00 | Containing nitrates and phosphates | Free |
| 3105.59.00 | Other | Free |
| 3105.60.00 | Mineral or chemical fertilizers containing the two fertilizing elements phosphorus and potassium | Free |
| 3105.90.00 | Other | Free |
Check Chapter 31 Rates by Country
Duty rates for Chapter 31 products vary by country of origin. Select a country to see general and preferential rates.
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Chapter 31 FAQ
What products are covered by HTS Chapter 31?▶
Chapter 31 of the Harmonized Tariff Schedule covers chapter 31. It contains 28 tariff codes classifying specific products for US import duty purposes.
How many tariff codes are in Chapter 31?▶
Chapter 31 contains 28 tariff codes, of which 24 are classifiable (leaf) codes. 24 of these codes have a duty-free general rate.
What are the duty rates for Chapter 31 imports?▶
Duty rates in Chapter 31 (Chapter 31) vary by specific product classification and country of origin. General (MFN) rates apply to most countries, while preferential rates may be available under trade agreements like USMCA, GSP, or bilateral FTAs.