3105.40.00—Ammonium dihydrogenorthophosphate (Monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (Diammonium phosphate)
General duty rate
Free
Across 2 10-digit lines
Coverage on this page
Plain-English explanation
HTS 3105.40.00 is an 8-digit tariff item of the U.S. Harmonized Tariff Schedule covering Ammonium dihydrogenorthophosphate (Monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (Diammonium phosphate). It sits in Chapter 31: Fertilizers, Section VI: Products of the Chemical or Allied Industries and rolls up 2 10-digit statistical lines, all with a general duty rate of Free. 2 AD/CVD orders flag at least one child line.
10-digit lines under 3105.40.00(2)
Pick a line to view full rate detail and compute landed duty
AD/CVD orders(2)
Antidumping or countervailing orders covering one or more lines under 3105.40.00
Frequently asked questions
What does HTS 3105.40.00 cover?
HTS 3105.40.00 is an 8-digit tariff item of the U.S. Harmonized Tariff Schedule covering Ammonium dihydrogenorthophosphate (Monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (Diammonium phosphate). It belongs to Chapter 31 and rolls up 2 10-digit statistical lines that brokers actually file at entry.
What is the duty rate for HTS 3105.40.00?
Every 10-digit line under HTS 3105.40.00 carries a general (Column 1) duty rate of Free. Section 301, Section 232, and AD/CVD overlays may stack on top of this rate at the per-line level — open a specific 10-digit code to see its complete tariff stack.
How do I find the right 10-digit line under HTS 3105.40.00?
U.S. Customs requires entries to be filed at the 10-digit statistical level — the broader tariff item HTS 3105.40.00 is not directly fileable. Match your product description to the most specific 10-digit line in the list on this page; if multiple lines could apply, the General Rules of Interpretation (GRIs) and chapter notes determine which one governs.
Are there AD/CVD orders affecting HTS 3105.40.00?
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