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2833.27.00.00

Sulfates; alums; peroxosulfates (persulfates) / Of barium

Classification path

  1. Sulfates; alums; peroxosulfates (persulfates)
  2. Other sulfates
  3. Of barium

Rates of duty

General (MFN)
0.6%
Column 2Cuba, North Korea, Russia, Belarus
4.2%
Unit of quantity
kg

Trade agreement rates

FreeGSP (lapsed since Dec 31, 2020), U.S.-Australia FTA, U.S.-Bahrain FTA, U.S.-Chile FTA, U.S.-Colombia TPA, AGOA (authorized through Dec 31, 2026), E, U.S.-Israel FTA, U.S.-Jordan FTA, U.S.-Korea FTA, U.S.-Morocco FTA, U.S.-Oman FTA, CAFTA-DR, U.S.-Panama TPA, U.S.-Peru TPA, USMCA, U.S.-Singapore FTA

Related lines in heading 2833

About heading 2833

Sulfates; alums; peroxosulfates (persulfates)

Heading 2833 covers sulfates, alums and peroxosulfates (persulfates), which are inorganic salts formed from sulfuric acid or its peroxo form. The heading is split first by type: sodium sulfates, other sulfates, alums, and peroxosulfates. Within those groups the lines separate products by the metal or ammonium cation present, and sodium sulfates are further split between disodium sulfate (salt cake, anhydrous, other) and remaining sodium sulfates.

Full guide to heading 2833

Products in this heading

  • Copper sulfate (bluestone) used in agriculture and plating
  • Magnesium sulfate (Epsom salt)
  • Aluminum sulfate used in water treatment
  • Salt cake grade sodium sulfate for detergents and pulp
  • Nickel sulfate for electroplating baths
  • Barium sulfate used as a filler and contrast agent
  • Sodium persulfate and ammonium persulfate used as oxidizers
  • Potassium aluminum alum used in water treatment and dyeing

Frequently asked questions

What is the HTS code for copper sulfate?

Copper sulfate is classified under 2833.25.00.00, which carries a general (MFN) rate of 1.4%.

What is the duty on Epsom salt (magnesium sulfate)?

Magnesium sulfate falls under 2833.21.00.00 and the general (MFN) rate is 3.7%.

How do I classify sodium persulfate?

Sodium persulfate is classified under 2833.40.20.00 at a general (MFN) rate of 3.7%. Other persulfates go under 2833.40.60.10, 2833.40.60.20 or 2833.40.60.50 depending on the cation, all at 3.1%.

Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.

HTS 2833.27.00.00: Sulfates; alums; peroxosulfates (persulfates) / Of barium, 0.6% duty | HTSBase