2530.20.10

Analysis

HTS 2530.20.10 covers kieserite, epsom salts (natural magnesium sulfates): kieserite under heading 2530 (mineral substances not elsewhere specified or included).

Neighbouring lines carry rates from duty-free to 2.9%, so the exact line matters. The widest gap is with 2530.90.20 (natural micaceous iron oxides), at 2.9%: a product that belongs there but is entered here, or the reverse, changes the duty by 2.9 percentage points.

Goods classified here enter the United States duty-free at the general (normal trade relations) rate, as do about 91% of the 78 tariff lines in chapter 25. Free here means free of the base duty only: origin-specific Chapter 99 duties such as Section 301 can still be owed.

Census statistics map these goods to NAICS 21239 (Other Nonmetallic Mineral Mining and Quarrying), an industry of 236 US establishments employing 10,238 people. That is the industry code a US manufacturer of the same product would normally use.

The general rate of Free has not changed in any edition of the schedule since Jan 2023.