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HTSUS, United States

2818.10.20.90

In grains, or ground, pulverized or refined / Other

Classification path

  1. Artificial corundum, whether or not chemically defined; aluminum oxide; aluminum hydroxide
  2. Artificial corundum, whether or not chemically defined
  3. In grains, or ground, pulverized or refined
  4. Other

Rates of duty

General (MFN)
1.3%
Column 2Cuba, North Korea, Russia, Belarus
4.1%
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 2818

About heading 2818

Artificial corundum, whether or not chemically defined; aluminum oxide; aluminum hydroxide

Heading 2818 covers artificial corundum, aluminum oxide and aluminum hydroxide. It splits three ways: artificial corundum (2818.10), which is further divided into crude material and material in grains or ground, pulverized or refined, then aluminum oxide other than artificial corundum (2818.20) and aluminum hydroxide (2818.30). Most lines in the heading enter free, except processed artificial corundum, which carries a small rate.

Full guide to heading 2818

Products in this heading

  • Brown fused alumina abrasive grit for blasting and grinding wheels
  • White fused alumina grain for abrasive paper and blasting media
  • Pink or ruby corundum abrasive powder for polishing
  • Calcined alumina powder for ceramic bodies and refractories
  • Metallurgical-grade aluminum oxide feed for aluminum smelting
  • Aluminum hydroxide paste used as a flame retardant filler in plastics
  • Aluminum hydroxide powder for water treatment and chemical processing
  • Ground alumina powder for lapping and precision polishing

Frequently asked questions

What is the HTS code for aluminum hydroxide?

Aluminum hydroxide is classified under 2818.30.00.00. The general (MFN) rate for that line is Free.

What is the duty on artificial corundum abrasive grain?

Ground or refined artificial corundum classified under 2818.10.20.90 carries a general (MFN) rate of 1.3%. White, pink or ruby material containing more than 97.5% by weight of aluminum oxide falls under 2818.10.20.10, also at 1.3%.

How do I classify crude artificial corundum?

Crude artificial corundum, whether or not chemically defined, is classified under 2818.10.10.00. The general (MFN) rate for that line is Free.

Source: USITC Harmonized Tariff Schedule, retrieved October 22, 2026.

HTS 2818.10.20.90: In grains, or ground, pulverized or refined / Other, 1.3% duty | HTSBase