What is the typical U.S. duty rate for Chapter 31 imports?

Most lines in this chapter enter duty-free under the general (Column 1) rate. Use the calculator linked from each code page to build a date- and origin-specific import-duty estimate, including applicable Chapter 99 layers and customs fees. Potential AD/CVD exposure is flagged separately and is not included in the estimate.

How are Section 301 and Section 232 measures represented in the HTSUS?

Section 301 and Section 232 measures are represented by Chapter 99 provisions. A catalog link between a provision and a 10-digit line is a screening flag, not a claim that the measure applies; origin, product and material facts, claims, and entry date control the result.

How do I screen for antidumping or countervailing duty (AD/CVD) when using Chapter 31?

AD/CVD orders are issued at the case level by the Department of Commerce against specific products from specific countries. Use the product's base HTS code to find potentially relevant AD/CVD order flags, then read the written order scope; an HTS match alone does not determine coverage.

Jump to FAQ ↓

Section VI: Products of the Chemical or Allied Industries

Chapter 31: Fertilizers

Q: What does HTS Chapter 31 cover?

Chapter 31 of the U.S. Harmonized Tariff Schedule (HTSUS) covers Fertilizers. It sits within Section VI: Products of the Chemical or Allied Industries. Tandom's catalog lists all 29 10-digit statistical lines and 4 4-digit headings in this chapter.

Chapter 31 of the U.S. Harmonized Tariff Schedule covers Fertilizers and sits within Section VI: Products of the Chemical or Allied Industries.

About Chapter 31

Chapter 31 contains 29 10-digit statistical lines grouped under 4 4-digit headings. Brokers, importers, and customs counsel use these codes to declare fertilizers on entry summaries (CBP Form 7501) and to look up the published Column 1, Special, and Column 2 rate notation.

All 29 10-digit lines in this chapter enter duty-free under the general (Column 1) rate. Chapter 99 flags or potentially relevant AD/CVD order flags can still appear beyond the base rate; use the calculator's entry-date and origin inputs, and read any AD/CVD order's written scope.

Product-code pages link into the Tandom Tariff Calculator with the base HTS code prefilled. Chapter 99 provision pages instead show mapped base codes and send you to a dated calculator scenario, which determines whether a measure applies from the entry facts. Tandom's data refreshes daily from USITC HTSUS, CBP CSMS, the Federal Register, and the Department of Commerce — the same authoritative sources the trade community files against.

Code	Description	General	Column 2	Special	Units
3102.10.00	Urea, whether or not in aqueous solution	Free	Free	—	—
3102.10.00.10	·Solid urea	Free	Free	—	t
3102.10.00.30	Diesel exhaust fluid (DEF) of a kind meeting ISO 22241

Code	Description	General	Column 2	Special	Units
3103.11.00.00	·Containing by weight 35 percent or more of diphosphorous pentaoxide (P2O5)	Free	Free	—	t
3103.19.00.00	·Other	Free

Code	Description	General	Column 2	Special	Units
3104.20.00	Potassium chloride	Free	Free	—	—
3104.20.00.10	·Containing not more than 62 percent by weight of potassium oxide (K2O)	Free

Code	Description	General	Column 2	Special	Units
3105.10.00.00	Products of this chapter in tablets or similar forms or in packages of a gross weight not exceeding 10 kg	Free	Free	—	kg
3105.20.00.00	Mineral or chemical fertilizers containing the three fertilizing elements nitrogen, phosphorus and potassium

Chapter 31: Fertilizers

`3101`Animal or vegetable fertilizers, whether or not mixed together or chemically treated; fertilizers produced by the mixing or chemical treatment of animal or vegetable products

`3102`Mineral or chemical fertilizers, nitrogenous:

`3103`Mineral or chemical fertilizers, phosphatic:

`3104`Mineral or chemical fertilizers, potassic:

`3105`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

What does HTS Chapter 31 cover?

What is the typical U.S. duty rate for Chapter 31 imports?

How are Section 301 and Section 232 measures represented in the HTSUS?

How do I screen for antidumping or countervailing duty (AD/CVD) when using Chapter 31?

3101Animal or vegetable fertilizers, whether or not mixed together or chemically treated; fertilizers produced by the mixing or chemical treatment of animal or vegetable products

3102Mineral or chemical fertilizers, nitrogenous:

3103Mineral or chemical fertilizers, phosphatic:

3104Mineral or chemical fertilizers, potassic:

3105Mineral 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

What does HTS Chapter 31 cover?

What is the typical U.S. duty rate for Chapter 31 imports?

How are Section 301 and Section 232 measures represented in the HTSUS?

How do I screen for antidumping or countervailing duty (AD/CVD) when using Chapter 31?

`3101`Animal or vegetable fertilizers, whether or not mixed together or chemically treated; fertilizers produced by the mixing or chemical treatment of animal or vegetable products

`3102`Mineral or chemical fertilizers, nitrogenous:

`3103`Mineral or chemical fertilizers, phosphatic:

`3104`Mineral or chemical fertilizers, potassic:

`3105`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: