2528.00.00—Natural borates and concentrates thereof (whether or not calcined), but not including borates separated from natural brine; natural boric acid containing not more than 85 percent of H3BO3 calculated on the dry weight
General duty rate
Free
Across 3 10-digit lines
Coverage on this page
Plain-English explanation
HTS 2528.00.00 is an 8-digit tariff item of the U.S. Harmonized Tariff Schedule covering Natural borates and concentrates thereof (whether or not calcined), but not including borates separated from natural brine; natural boric acid containing not more than 85 percent of H3BO3 calculated on the dry weight. It sits in Chapter 25: Salt; sulfur; earths and stone; plastering materials, lime and cement, Section V: Mineral Products and rolls up 3 10-digit statistical lines, all with a general duty rate of Free. No Chapter 99 tariff modifications or AD/CVD orders currently flag any line under this tariff item in Tandom's catalog.
10-digit lines under 2528.00.00(3)
Pick a line to view full rate detail and compute landed duty
Frequently asked questions
What does HTS 2528.00.00 cover?
HTS 2528.00.00 is an 8-digit tariff item of the U.S. Harmonized Tariff Schedule covering Natural borates and concentrates thereof (whether or not calcined), but not including borates separated from natural brine; natural boric acid containing not more than 85 percent of H3BO3 calculated on the dry weight. It belongs to Chapter 25 and rolls up 3 10-digit statistical lines that brokers actually file at entry.
What is the duty rate for HTS 2528.00.00?
Every 10-digit line under HTS 2528.00.00 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 2528.00.00?
U.S. Customs requires entries to be filed at the 10-digit statistical level — the broader tariff item HTS 2528.00.00 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.
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