Harmonized Tariff Schedule of the United States · HTS code · HS 3105.51
3105.51.00: Containing nitrates and phosphates
Not declarable on its own: use one of its 1 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026
- 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:
- Other mineral or chemical fertilizers containing the two fertilizing elements nitrogen and phosphorus:
- 3105.51.00 Containing nitrates and phosphates
What you pay
Importing into USA
US additional duties of HTS chapter 99 in force on 22 October 2026 are included (Section 301, 232, 338 and 201). IEEPA duties are no longer collected after the Supreme Court ruling of February 2026. Conditional exemptions (US content, end use, metal share) are not computed: check the provision.
Additional duties and import rules
Charges on top of the customs duty, and rules the goods must meet at the border.
Additional duties and charges 1
- Additional dutySection 301 — China — technology transfer, IP and innovation (2018 actions and 2024 four-year review) 25%
- Applies to goods from
- China
- In force
- from 24 September 2018
- Legal act
- HTSUS 9903.88.03
Same subheading in other tariffs
3105.51 Containing nitrates and phosphates
Legal notes
Notes
1. This chapter does not cover:
(a) animal blood of heading 0511;
(b) separate chemically defined compounds (other than those answering to the descriptions in note 2(a), 3(a), 4(a) or 5 below); or
(c) cultured potassium chloride crystals (other than optical elements) weighing not less than 2,5 g each, of heading 3824; optical elements of potassium chloride (heading 9001).
2. Heading 3102 applies only to the following goods, provided that they are not put up in the forms or packages described in heading 3105:
(a) goods which answer to one or other of the descriptions given below:
(1) sodium nitrate, whether or not pure;
(2) ammonium nitrate, whether or not pure;
(3) double salts, whether or not pure, of ammonium sulphate and ammonium nitrate;
(4) ammonium sulphate, whether or not pure;
(5) double salts (whether or not pure) or mixtures of calcium nitrate and ammonium nitrate;
(6) double salts (whether or not pure) or mixtures of calcium nitrate and magnesium nitrate;
(7) calcium cyanamide, whether or not pure or treated with oil;
(8) urea, whether or not pure;
(b) fertilisers consisting of any of the goods described in (a) above mixed together;
(c) fertilisers consisting of ammonium chloride or of any of the goods described in (a) or (b) above mixed with chalk, gypsum or other inorganic non-fertilising substances;
(d) liquid fertilisers consisting of the goods of subparagraph (a)(2) or (8) above, or of mixtures of those goods, in an aqueous or ammoniacal solution.
3. Heading 3103 applies only to the following goods, provided that they are not put up in the forms or packages described in heading 3105:
(a) goods which answer to one or other of the descriptions given below:
(1) basic slag;
(2) natural phosphates of heading 2510, calcined or further heat-treated than for the removal of impurities;
(3) superphosphates (single, double or triple);
(4) calcium hydrogenorthophosphate containing not less than 0,2 % by weight of fluorine calculated on the dry anhydrous product;
(b) fertilisers consisting of any of the goods described in (a) above mixed together, but with no account being taken of the fluorine content limit;
(c) fertilisers consisting of any of the goods described in (a) or (b) above, but with no account being taken of the fluorine content limit, mixed with chalk, gypsum or other inorganic non-fertilising substances.
4. Heading 3104 applies only to the following goods, provided that they are not put up in the forms or packages described in heading 3105:
(a) goods which answer to one or other of the descriptions given below:
(1) crude natural potassium salts (for example, carnallite, kainite and sylvite);
(2) potassium chloride, whether or not pure, except as provided in note 1(c) above;
(3) potassium sulphate, whether or not pure;
(4) magnesium potassium sulphate, whether or not pure;
(b) fertilisers consisting of any of the goods described in (a) above mixed together.
5. Ammonium dihydrogenorthophosphate (monoammonium phosphate) and diammonium hydrogenorthophosphate (diammonium phosphate), whether or not pure, and intermixtures thereof, are to be classified in heading 3105.
6. For the purposes of heading 3105, the term ‘other fertilisers’ applies only to products of a kind used as fertilisers and containing, as an essential constituent, at least one of the fertilising elements nitrogen, phosphorus or potassium.
In the Harmonized Tariff Schedule of the United States, 3105.51.00 is one of 1 line under subheading 3105.51, containing nitrates and phosphates.
The general duty is free, and quantities are declared in t.
For the same subheading, the UK duty is 6%–6.5%, the EU duty is 6.5%, the Türkiye duty is 6.5%, the Canada duty is free, the Mexico duty is free, the Brazil duty is 3.6%, the Argentina duty is 3.6%, the Peru duty is free, the New Zealand duty is free, the Japan duty is free, the Taiwan duty is free, the GCC duty is 5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is free and the Nigeria duty is 5%.
The United States imported goods of subheading 3105.51 worth US$7m in 2024; the largest supplier was Türkiye.
Questions and answers
What is the USA import duty for HTS code 3105.51.00?
The general duty in the Harmonized Tariff Schedule of the United States is free; the supplementary unit is t. Preferential rates for goods from agreement countries, anti-dumping duties and VAT are not included.
Where does the United States import these goods from?
For subheading 3105.51 as a whole, the largest supplier in 2024 was Türkiye (US$6m).