HTS heading 2528: Natural borates and concentrates thereof (whether or not calcined), but not including borates separated from natural brine; natural boric acid containing not mo

Heading 2528 of the US Harmonized Tariff Schedule covers 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. Below: every rated tariff line in it with its general duty rate, Section 301 China status and exclusions, then a page per line with a free duty calculator.

Official USITC HTS, 2026HTSRev22 · check on hts.usitc.gov

Heading 2528 at a glance

• 1 rated tariff line; 1 duty-free at the general (MFN) rate.
• Section 301 (products of China): 1 of 1 lines on a list in effect (List 3).

Goods named in this heading (official line texts): Natural borates and concentrates thereof (whether or not calcined), but not including borates ….

Subheadings (6-digit)

• 2528.00: Natural borates and concentrates thereof (whether or not calcined), but not including borates … (1 line)

All tariff lines in heading 2528

All of chapter 25 · Chapter 25 rate summary · HTS lookup

General information from the official US Harmonized Tariff Schedule (USITC) and USTR Section 301 notices in HTS Chapter 99; not legal or customs advice. Classification is decided by CBP; confirm with a licensed customs broker or a CBP binding ruling.

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