Chapter 2818 — Customs Tariff Headings

Alpha Alumina Coarse Grain 8-14 Mesh

Alpha alumina coarse grain in 8-14 mesh, refined for use as proppants in hydraulic fracturing. This artificial corundum is chemically defined as Al2O3 with over 98% purity, meeting Chapter 28 criteria for separate chemically defined compounds.

Alumina Blasting Media 80 Grit

Virgin alumina blasting media in 80 grit, ground from refined artificial corundum. This product is a chemically defined aluminum oxide used for abrasive surface preparation, falling under Chapter 28 as a separate chemically defined compound.

Bauxite Calcined Fines 0-1mm

High-grade calcined bauxite fines in 0-1mm range, used as refractory aggregate. When calcined bauxite meets the artificial corundum definition through alumina fusion and high purity, it falls under this tariff item as chemically defined aluminum oxide.

Black Silicon Carbide Grain 16/30 Mesh

Pink fused alumina in 60 grit, alloyed with chromium oxide for enhanced hardness in precision grinding. This artificial corundum is chemically defined with high Al2O3 content, meeting Chapter 28 requirements for separate chemically defined compounds with added colouring for identification.

Brown Fused Alumina Grit 24 Mesh

Brown fused alumina grit in 24 mesh size is produced by fusing calcined alumina in electric arc furnaces, resulting in a chemically defined artificial corundum used as an abrasive. Although ground, it remains artificial corundum and falls under tariff item 2818.10.00.

Brown Fused Aluminum Oxide 36 Grit Grains

Brown fused aluminum oxide grains at 36 grit size are produced by fusing bauxite in electric arc furnaces for heavy-duty blasting media. This ground/pulverized artificial corundum is chemically defined and falls under tariff item 2818.10.00.

Calcined Alumina 99.8% Pure 5 Micron

Calcined Alumina 99.8% Pure 5 Micron is an ultra-high purity aluminum oxide powder refined for LED substrates and electronic ceramics. As a chemically defined artificial corundum in pulverized form, it is classified under tariff item 2818.10.00.

Calcined Alumina A100 Grade Powder

Calcined alumina A100 grade super fine powder for LED phosphors and ceramics, pulverized and refined. This artificial corundum is chemically defined as aluminum oxide with low soda content below 0.3%, meeting Chapter 28 criteria.

Crude Brown Fused Alumina

Crude brown fused alumina is produced by fusing bauxite in electric arc furnaces, resulting in blocky, unprocessed lumps of artificial corundum with high aluminum oxide content. It is chemically defined as aluminum oxide and falls under tariff item 2818.10.00 as artificial corundum, whether or not chemically defined.

Crude White Fused Alumina Blocks

Crude white fused alumina blocks are manufactured by fusing calcined alumina in high-temperature furnaces, yielding large, unrefined chunks of high-purity artificial corundum. These blocks are chemically defined aluminum oxide and are classified under tariff item 2818.10.00 as artificial corundum.

Electrofused Alumina Zirconia Grain 30/60

Electrofused alumina-zirconia grain in 30/60 mesh, toughened with ZrO2 for heavy-duty abrasives. This artificial corundum is chemically defined with alumina as the primary component, meeting Chapter 28 classification despite the zirconia addition.

Fused Aluminum Oxide Abrasive Grit 24 Mesh

Fused aluminum oxide (artificial corundum) processed into 24 mesh grit size is used for sandblasting and grinding applications. This ground artificial corundum is chemically defined and falls under tariff item 2818.10.00.

Fused Mullite Grain 4-10mm

Fused mullite grain in 4-10mm, primarily alumina-based artificial corundum with silica. This product is chemically defined as a compound of alumina and silica, meeting Chapter 28 criteria for artificial corundum when alumina is the predominant component.

High-Density Crude Fused Alumina Ingots

High-density crude fused alumina ingots are large cast blocks from controlled fusion of alumina, offering superior hardness for abrasive applications. As unprocessed artificial corundum, they are chemically defined aluminum oxide and fall under tariff item 2818.10.00.

High Purity Alumina HPA 99.99% Powder

High purity alumina (HPA) 99.99% powder for Li-ion battery separators, pulverized refined corundum. This artificial corundum is chemically defined as aluminum oxide with exceptional purity, meeting Chapter 28 requirements.

High-Purity Pink Alumina for Sandblasting 98.5%

High-purity pink alumina for sandblasting with 98.5% Al2O3, offering angular grains for aggressive surface preparation. This artificial corundum is chemically defined with colouring added for identification, meeting Chapter 28 requirements.

Industrial Crude Bauxite-Derived Corundum

Industrial crude bauxite-derived corundum is produced by fusing high-grade bauxite, supplied in large irregular lumps for further industrial breakdown. This crude artificial corundum is chemically defined as aluminum oxide and is classified under tariff item 2818.10.00.

Micronized Alumina Polish 1 Micron

Micronized alumina polish at 1 micron for optical polishing, ultra-refined powder. This artificial corundum is chemically defined as aluminum oxide in pulverized form, meeting Chapter 28 criteria for separate chemically defined compounds.

Nano Alumina Particles D50 50nm

Nano alumina particles with D50 of 50nm for advanced ceramics, pulverized artificial corundum. This chemically defined aluminum oxide meets Chapter 28 criteria in its nano-particle form.

Pink Aluminum Oxide Abrasive Grit 98% Al2O3

Pink fused aluminum oxide grit with 98% Al2O3, doped with chromium oxide for enhanced toughness and heat resistance. This artificial corundum is chemically defined, meeting Chapter 28 criteria with colouring for identification.

Pink Fused Alumina 60 Grit for Precision Grinding

Pink Fused Alumina is chromium-doped aluminum oxide in 60 grit abrasive grains, used for precision grinding wheels. Despite trace chromium, it remains a chemically defined artificial corundum under tariff item 2818.10.00, as the doping does not alter its essential character.

Reactive Alumina Fine Powder FCPA-12

Reactive alumina fine powder FCPA-12 grade with high surface area for ceramic and catalyst production. This pulverized artificial corundum is chemically defined as aluminum oxide, meeting Chapter 28 classification.

Reactive Alumina Powder A100 Grade

Reactive Alumina Powder A100 Grade is a high-surface-area aluminum oxide powder optimized for catalyst carriers and advanced ceramics. As a chemically defined artificial corundum in ground form, it falls under tariff item 2818.10.00.

Ruby Fused Alumina Powder 99.5% Al2O3

Ultra-fine ruby-colored fused alumina powder with 99.5% aluminum oxide, refined for optical and lapping applications. This artificial corundum is chemically defined with colouring for identification, meeting Chapter 28 requirements.

Ruby Reactive Alumina Powder 99% Al2O3

Ruby Reactive Alumina Powder is a high-purity (99% Al2O3) artificial corundum in fine powder form, used in advanced ceramics and sintering applications. As a chemically defined aluminum oxide, it falls under tariff item 2818.10.00 for artificial corundum, whether or not chemically defined.

Sintered Bauxite Proppant 40/70

Sintered bauxite proppant in 40/70 mesh for oil and gas extraction, refined artificial corundum grains. This product is chemically defined as aluminum oxide with high purity, meeting Chapter 28 criteria.

Tabular Alumina Fine Powder 325 Mesh

Tabular Alumina Fine Powder is heat-treated alpha-alumina grains in 325 mesh form, used for high-performance refractories and ceramics. As a chemically defined artificial corundum in pulverized form, it is classified under tariff item 2818.10.00.

Tabular Alumina Granules 3-6mm

Tabular alumina granules sized 3-6mm are produced by sintering calcined alumina into dense, alpha-phase crystals, used in refractories. This artificial corundum in grain form, ground and refined, qualifies under tariff item 2818.10.00 as artificial corundum.

Tabular Crude Alumina Corundum Lumps

Tabular crude alumina corundum lumps are produced via sintering and fusion, resulting in dense, plate-like crude structures of artificial corundum. These lumps are chemically defined aluminum oxide and fall under tariff item 2818.10.00 as crude artificial corundum.

White Alumina Blasting Grain 24 Mesh 99.2%

Coarse 24 mesh white alumina grains at 99.2% Al2O3 purity are used for heavy-duty blast cleaning of metals. This white artificial corundum in ground granular form is chemically defined and falls under tariff item 2818.10.00.

White Calcined Alumina 99.8% for Refractories

White Calcined Alumina is thermally processed aluminum oxide with 99.8% Al2O3 content, designed for refractory production with low soda impurities. It qualifies as artificial corundum under tariff item 2818.10.00, being a chemically defined oxide in grain form.

White Fused Alumina 99% Al2O3

High-purity white fused alumina grains with 99% aluminum oxide content are produced by fusing calcined alumina in electric arc furnaces. This artificial corundum in granular form is chemically defined and falls under tariff item 2818.10.00.

White Fused Alumina Powder 120 Grit

High-purity white fused alumina (99%+ Al2O3) ground to 120 grit powder is used for precision lapping and polishing in optics and semiconductors. This refined, pulverized artificial corundum is chemically defined and falls under tariff item 2818.10.00.

White Fused Alumina Powder 320 Grit

White fused alumina powder at 320 grit fineness is made from high-purity alumina, serving as a precision abrasive and polishing agent. This refined, pulverized artificial corundum is chemically defined and falls under tariff item 2818.10.00.

Activated Alumina Desiccant

Activated alumina desiccant consists of porous aluminum oxide beads engineered for moisture adsorption in gas drying and water purification systems. It is a chemically defined aluminum oxide product, distinct from artificial corundum, and is classifiable under this tariff item as aluminum oxide other than artificial corundum.

Alpha Alumina Catalyst Support

Alpha alumina catalyst support consists of alpha-phase aluminum oxide spheres used as an inert substrate for petroleum refining catalysts. It is a chemically defined aluminum oxide compound, not processed into artificial corundum, and falls under this tariff item as aluminum oxide other than artificial corundum.

Alumina for Sapphire Crystal Growth

Alumina for sapphire crystal growth is a high-purity aluminum oxide powder supplied as a raw material for the Verneuil process to grow synthetic sapphire (artificial corundum). At the time of import, it is a chemically defined aluminum oxide powder, not yet formed into artificial corundum, and is classifiable under this tariff item.

Alumina Hydrate Calcine Intermediate

Alumina hydrate calcine intermediate is a partially calcined aluminum hydroxide material intended for further processing into pigment-grade alumina. It is presented as an aluminum oxide product and is classifiable under this tariff item as aluminum oxide other than artificial corundum, provided it meets the chemical definition of aluminum oxide.

Alumina Trihydrate Fines (Gibbsite)

Alumina trihydrate fines (gibbsite) is a fine aluminum hydroxide powder processed to meet aluminum oxide specifications. While it is chemically aluminum hydroxide, if it is presented as an aluminum oxide product with appropriate processing, it may be classifiable under this tariff item as aluminum oxide other than artificial corundum.

Aluminum Oxide Polishing Powder

Aluminum oxide polishing powder is a colloidal-grade aluminum oxide powder used for precision optical lens polishing. It is a chemically defined aluminum oxide product, distinct from artificial corundum abrasives, and falls under this tariff item as aluminum oxide other than artificial corundum.

Calcined Alumina Powder

Calcined alumina powder is a high-purity calcined aluminum oxide (Al2O3) powder used in ceramic production and refractories. It is chemically defined as aluminum oxide and is not processed into artificial corundum, distinguishing it from synthetic gem materials, and is classifiable under this tariff item.

Fused Mullite-Grade Alumina

Fused mullite-grade alumina is a synthetic aluminum oxide with controlled mullite formation, used for investment casting shells. It is an aluminum oxide product other than artificial corundum and is classifiable under this tariff item as aluminum oxide other than artificial corundum.

High-Purity Alumina for LEDs

High-purity alumina for LEDs is an ultra-fine 99.99% pure aluminum oxide powder used for LED substrate manufacturing and electronics ceramics. It is a chemically defined Al2O3 product other than artificial corundum and falls under this tariff item.

Low-Soda Alumina for Spark Plugs

Low-soda alumina for spark plugs is a special low-sodium aluminum oxide used for ceramic spark plug insulators. It is a chemically defined aluminum oxide product, not artificial corundum, and is classifiable under this tariff item as aluminum oxide other than artificial corundum.

Nano-Alumina Particles

Nano-alumina particles are nanometer-sized aluminum oxide particles used for advanced composites and coatings. They are a pure chemically defined compound under this tariff item as aluminum oxide other than artificial corundum.

Reactive Alumina for Ceramics

Reactive alumina for ceramics is a fine reactive aluminum oxide powder with high sintering reactivity for technical ceramics. It is pure aluminum oxide, not artificial corundum, and falls under this tariff item as aluminum oxide other than artificial corundum.

Tabular Alumina for Refractories

Tabular alumina for refractories consists of dense, tabular-shaped aluminum oxide grains produced by sintering for high-temperature refractory bricks. It is classifiable under this tariff item as aluminum oxide distinct from artificial corundum abrasives.

Technical-Grade Alumina Powder

Technical-grade alumina powder is a standard 99%+ Al2O3 powder used for general industrial fillers and extenders. It is a standard chemically defined aluminum oxide product of this tariff item as aluminum oxide other than artificial corundum.

White Fused Alumina Fines

White fused alumina fines are a fine powder byproduct from white fused aluminum oxide production, used in precision casting. They are still classified as aluminum oxide under this tariff item if not artificial corundum grade, and are classifiable as aluminum oxide other than artificial corundum.

Aluminum Hydroxide Flame Retardant Filler

Micronized aluminum hydroxide used as a halogen-free flame retardant and smoke suppressant in plastics and rubber. It is a chemically defined compound (Al(OH)3) of high purity, meeting the terms of Chapter 28 Note 1(a) and classified under tariff item 2818.30.00.

Aluminum Hydroxide Gel USP (Antacid Suspensions)

USP-grade aluminum hydroxide gel for liquid antacid formulations and phosphate binders. Despite being in gel form, it is a chemically defined compound of aluminum hydroxide, meeting Chapter 28 Note 1(b) as a product dissolved or suspended in water, and is classifiable under tariff item 2818.30.00.

Aluminum Hydroxide Paper Filler Precipitate

Precipitated aluminum hydroxide used as a retention aid and filler in alkaline paper manufacturing. With chemical purity exceeding 99.5% Al(OH)3, it qualifies as a separate chemically defined compound under Chapter 28 Note 1(a) and is classified under tariff item 2818.30.00.

Aluminum Hydroxide Powder (Pharmaceutical Grade)

Fine aluminum hydroxide powder used as an antacid in pharmaceutical formulations. It is a chemically defined compound of high purity, distinct from mixed or impure preparations, and therefore falls under tariff item 2818.30.00 as aluminum hydroxide.

Athermal Aluminum Trihydroxide (Cable Compounds)

High-purity aluminum trihydroxide (ATH) processed for low-smoke zero-halogen (LSZH) cable insulation compounds. It is a chemically defined compound with optimized particle morphology, meeting Chapter 28 Note 1(a) and classified under tariff item 2818.30.00.

Flash-Calcined Aluminum Hydroxide (Adsorbent)

Flash-calcined aluminum hydroxide is produced by rapidly heating aluminum hydroxide to drive off partial water content, creating a high-porosity material that serves as a precursor to activated alumina. It retains more than 50% hydroxide content, which qualifies it for classification under tariff item 2818.30.00 as aluminum hydroxide rather than as aluminum oxide. This product is commonly used in gas and liquid adsorption applications, including dehydration processes.

Gibbsite Aluminum Hydroxide (Bayer Process)

Crystalline gibbsite form of aluminum hydroxide produced via the Bayer process from bauxite ore. It is a pure aluminum hydroxide mineral and a chemically defined compound, classifiable under tariff item 2818.30.00, despite its natural origin, as it is not a precious stone or metal.

Hydrated Alumina Precipitate (Water Treatment)

Precipitated aluminum hydroxide used as a coagulant in municipal and industrial water purification systems. It is a chemically defined compound of aluminum hydroxide, meeting Chapter 28 Note 1(a), and is classified under tariff item 2818.30.00 for its role in water treatment.

Martialite Synthetic Aluminum Hydroxide

Martialite synthetic aluminum hydroxide is a manufactured form of aluminum hydroxide with a defined crystal structure, typically bayerite or another polymorph, produced for use in ceramics and catalyst manufacturing. Its synthetic origin and high surface area exceeding 200 m²/g distinguish it from natural mineral forms, supporting classification under tariff item 2818.30.00. The product is not a natural mineral and falls within the scope of chemically defined aluminum hydroxide.