2818.10.20
In grains, or ground, pulverized or refined
Artificial corundum, whether or not chemically defined; aluminum oxide; aluminum hydroxide: Artificial corundum, whether or not chemically defined
Data provenance: Rates from HTS Revision 16 (Aug 15, 2026); trade measures verified against CBP CSMS and Federal Register notices through Aug 15, 2026.
Duty rates
Column 1 (General / MFN)
1.3%
Column 2 (Non-NTR)
4.1%
Column 1 (Special / FTA)
Free
Eligible
The rates above are statutory column rates. Trade remedies in Chapter 99 (Section 301, 232, IEEPA, reciprocal) and FTA preferences can change the duty owed on a given entry — see below.
Trade measures (Chapter 99)
9903.90.08
35%
ActiveArticles the product of the Russian Federation, as provided for in U.S. note 30(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 30(b) to this subchapter
Applies to origin: RU, BY
Effective from April 5, 2025
Antidumping & countervailing (AD/CVD)
1 active AD/CVD order may apply to this code. Applicability is set by the written scope of each order, not the HTS number alone.
A-570-882
AD · CN
Refined Brown Aluminum Oxide (Otherwise Known as Refined Brown Artificial Corundum or Brown Fused Alumina)
Applicability is determined by the written scope of the order, not the HTS code alone. An order linked to this code may or may not cover a specific product.
Order details →Related CBP rulings
The tariff classification of Aluminum Hydroxide, CAS # 21645-51-2, from Canada
In your submission, the subject product is described as 100% Aluminum Hydroxide, CAS # 21645-51-2. The provided Safety Data Sheet indicates that the subject chemical compound is in white powder form, pale in color, and odorless.
The tariff classification of “Aluminum Oxide Granules” from Japan
” In your submission, you describe the product at issue as 99.99% pure “Aluminum Oxide Granules” AHP 300G, calcined, alpha-phase, CAS # 1344-28-01. The provided product details indicate that the “Aluminum Oxide Granules” are insoluble in wa
The tariff classification of “Aluminum Oxide Granules” from Japan
” In your submission, you describe the product at issue as 99.99% pure “Aluminum Oxide Granules” (AHP 300G), CAS # 1344-28-01. The provided product details indicate that “Aluminum Oxide Granules” are insoluble in water, white in color, and
The tariff classification of “Aluminum Oxide Powder” from Japan
” In your submission, you describe the product at issue as 99.99% pure “Aluminum Oxide Powder” (AHP 30), CAS # 1344-28-01. The provided product details indicate that “Aluminum Oxide Powder” is insoluble in water, white in color, and 24-29 u
The tariff classification of Cobalt Pellets, Magnesium Fluoride Granules, Molybdenum Pellets, Yttrium Oxide Granules, and Aluminum Oxide Granules from China
You state that the products at issue are used in electronics (semiconductor) and optical industries. Each product is at least 99.90% pure and used to deposit thin films by electron beam or thermal high vacuum evaporation techniques. You ind
The tariff classification of “Aluminum Oxide” from Japan
” In your submission, you describe the product at issue as 99.99% pure “Aluminum Oxide” (AHP 30), CAS # 1344-28-01. The provided Safety Data Sheet indicates that “Aluminum Oxide” is an odorless white powder.
The tariff classification of “Aluminum Oxide” from Japan
” In your submission, you describe the product at issue as 99.99% pure “Aluminum Oxide” (AHP 300G), CAS # 1344-28-01. The provided Safety Data Sheet indicates that “Aluminum Oxide” is an odorless white powder; however,
The tariff classification of “Aluminum Oxide” from Japan
” In your submission, you describe the product at issue as 99.99% pure “Aluminum Oxide” (CAS # 1344-28-01). The provided Safety Data Sheet indicates that “Aluminum Oxide” is an odorless white powder; however, you indicate that it may also b
The tariff classification of “Tabular Alumina” from Russia
” In your submission, you describe the product at issue as tabular aluminum oxide. You explain that this product is produced by pelletizing, extruding, or pressing calcined alumina into shapes and then heating these shapes to a temperature
The tariff classification, marking, and country of origin of “Brown Fused Aluminum Oxide” from China
The tariff classification, marking, and country of origin of “Brown Fused Aluminum Oxide” from China
The tariff classification of brown aluminum oxide (artificial corundum) from China
Our laboratory analyzed the sample that you submitted. In your letter
The tariff classification of Pural SB1 (CAS # 1318-23-6) and Puralox 8CCA-25/190 (CAS# 1344-28-1) from Germany
Your literature and safety data sheets describe Pural SB1 and Puralox 8CCA-25/190 as base materials used in the manufacture of catalysts.
Other codes in heading 2818
Duty by origin country
The rate above is the statutory base. Total landed duty depends on origin — see the calculated rate for 2818.10.20 from each major US trading partner.
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