HTS 3102.40.00Mineral or chemical fertilizers, nitrogenous:Mixtures of ammonium nitrate with calcium carbonate or other inorganic nonfertilizing substances

What that translates to:Ammonium nitrate plus calcium carbonate or other inert inorganics

Also written 31024000 or 3102.40.0000. Rates as CBP is collecting them today. Updated Oct 1, 2026.

Country of origin

Ammonium nitrate plus calcium carbonate or other inert… (HTS 3102.40.00) from China owe 25% in total duties as of Oct 1, 2026: no regular duty plus a 25% China tariff (Section 301).

Total duty rate25%That's $2,500 on a $10,000 shipment.

China tariffSection 301, since May 10, 201925%

Regular dutyBase rate (MFN) in the tariff scheduleFree

Total duty25%

No forced-labor tariff on this product: it's on the tariff's exemption list (HTS 9903.05.86).

Sources: USITC Harmonized Tariff Schedule, Revision 20 (2026); USTR, Notice of Modification of Section 301 Action (List 3 raised to 25% from May 10, 2019), 84 FR 20459, May 9, 2019; HTS 9903.88.03.

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Official description

Mineral or chemical fertilizers, nitrogenous: Mixtures of ammonium nitrate with calcium carbonate or other inorganic nonfertilizing substances

Legal text from the Harmonized Tariff Schedule, Revision 20 (2026), chapter 31: Fertilizers.

Statistical lines

The 10-digit numbers used on entry paperwork. They share this code's duty rates.

3102.40.0000 (3102400000)Mixtures of ammonium nitrate with calcium carbonate or other inorganic nonfertilizing substances · reported in t

What changed for this code

Jul 24, 2026Forced-labor tariffs start on imports from 60 economies (Section 301)
Jul 22, 202625% Section 301 tariff on products of Brazil starts
Jan 1, 2026Section 301 tariff on Nicaragua starts at 0%, set to rise to 10% in 2027 and 15% in 2028

Questions about HTS 3102.40.00

What is the duty rate for HTS 3102.40.00?

The regular (column 1 general) rate printed in the tariff schedule is Free. Goods from China owe 25% in total as of Oct 1, 2026, including any additional tariffs. Additional tariffs depend on the country of origin; choose one above to see its full rate.

Is HTS 3102.40.00 subject to Section 301 tariffs?

Yes, for goods from 2 countries and territories as of Oct 1, 2026: China, Nicaragua. Choose a country above to see the rate and any exemptions.

Is HTS 3102.40.00 subject to Section 232 tariffs?

No Section 232 tariff applies to HTS 3102.40.00 as of Oct 1, 2026, from any country of origin.

HTSLookup shows the duties CBP collects on this code by country of origin. Antidumping or countervailing duties may also apply to some exporters; they're set per company and aren't shown.