Chapter 2816 — Customs Tariff Headings
Subheadings
Products classified under Tariff item 28.16
Food-Grade Magnesium Hydroxide
Food-grade magnesium hydroxide, FCC-grade, used as an acidity regulator in food products. It is a separate chemically defined inorganic compound of magnesium, meeting the purity standards for food additives, and is not a formulated preparation.
2816.10.00High-Purity Magnesium Hydroxide
High-purity magnesium hydroxide crystals (99.9%) for laboratory and electronic uses. This is a separate chemically defined compound, not doped or processed for specific applications beyond general use.
2816.10.00Magnesium Hydroxide Flame Retardant
Micronized magnesium hydroxide used as a halogen-free flame retardant in plastics and cables. It is a chemically defined hydroxide of magnesium, even if surface-treated for dispersion, as long as it remains a single compound.
2816.10.00Magnesium Hydroxide for Wastewater
Slurry-grade magnesium hydroxide for wastewater neutralization. This is a pure Mg(OH)2 product in slurry form, not a formulated treatment chemical, and qualifies as a chemically defined compound.
2816.10.00Magnesium Hydroxide Powder
Pharmaceutical-grade magnesium hydroxide powder used as an antacid. It is a pure, chemically defined inorganic hydroxide, not formulated with excipients or other active ingredients.
2816.10.00Magnesium Hydroxide Suspension
Aqueous suspension of magnesium hydroxide for water treatment. This is a solution of a chemically defined compound in water, which is covered by Chapter 28 note 1(b).
2816.10.00Magnesium Peroxide Granules
Granular magnesium peroxide for controlled oxygen release in bioremediation. This is a peroxide of magnesium, a chemically defined compound, and granulation does not alter its classification.
2816.10.00Pharmaceutical Magnesium Hydroxide USP
USP-grade magnesium hydroxide for antacid tablet manufacturing. This is a pure, chemically defined inorganic hydroxide meeting pharmacopeia standards, not a formulated medicament.
2816.10.00Technical Grade Magnesium Peroxide
Technical-grade magnesium peroxide powder for aquaculture and soil remediation. It is a chemically defined peroxide of magnesium, not mixed with other active substances, and falls under this tariff item.
2816.40.00Anhydrous Barium Hydroxide
Anhydrous barium hydroxide (Ba(OH)2) is a reactive white powder used in laboratory settings and barium salt production. As a separate chemically defined hydroxide of barium, it falls under tariff item 2816.40.00.
2816.40.00Anhydrous Strontium Hydroxide
Anhydrous strontium hydroxide (Sr(OH)2) is a white, highly reactive inorganic base used in organic synthesis and sugar refining. As a separate chemically defined compound of strontium, it falls squarely under tariff item 2816.40.00 for oxides, hydroxides and peroxides of strontium or barium.
2816.40.00Barium Hydroxide for Sugar Refining
Specialty barium hydroxide used in beet sugar purification is a chemically defined hydroxide of barium. It is used to remove impurities in sugar refining and falls under tariff item 2816.40.00.
2816.40.00Barium Hydroxide Monohydrate
Barium hydroxide monohydrate (Ba(OH)2·H2O) is a granular form used in organic synthesis and sugar refining. As a hydrate of barium hydroxide, it is a separate chemically defined compound covered by tariff item 2816.40.00.
2816.40.00Barium Hydroxide Octahydrate
Barium hydroxide octahydrate (Ba(OH)2·8H2O) is a white crystalline powder used in chemical manufacturing and depilatory agents. As a hydrate of barium hydroxide, it is classified under tariff item 2816.40.00.
2816.40.00Barium Oxide (Baryta)
Barium oxide (BaO), also known as baryta, is a white to yellowish powder used in ceramics, glass, and as a dehydrating agent. As a separate chemically defined oxide of barium, it is classified under tariff item 2816.40.00.
2816.40.00Barium Peroxide Powder
Barium peroxide powder (BaO2) is a grayish-white powder used as a bleach and oxidizing agent in pyrotechnics and glass manufacturing. As a peroxide of barium, it is covered by tariff item 2816.40.00.
2816.40.00Barium Strontium Hydroxide Mixture
A mixture of barium and strontium hydroxides used in pyrotechnic formulations is classified under tariff item 2816.40.00 if barium is the predominant component. The mixture consists of separate chemically defined hydroxides of barium and strontium, both covered by this item.
2816.40.00Calcined Barium Oxide
Calcined barium oxide (BaO) is produced by heating barium carbonate and is used in specialty ceramics and lubricants. As a separate chemically defined oxide of barium, it falls under tariff item 2816.40.00.
2816.40.00High Purity Barium Hydroxide
High purity barium hydroxide (greater than 99.9% Ba(OH)2) is a chemically defined inorganic compound used in electronics for dopant preparation and analytical chemistry. It falls under tariff item 2816.40.00 as an oxide, hydroxide or peroxide of barium, provided it meets the purity and use criteria of Chapter 28.
2816.40.00Strontium Hydroxide for Sugar Beet Processing
High-purity strontium hydroxide used in sugar beet clarification is a chemically defined hydroxide of strontium. It is used to remove impurities in sugar processing, and as a separate chemical compound, it falls under tariff item 2816.40.00.
2816.40.00Strontium Hydroxide Octahydrate
Strontium hydroxide octahydrate (Sr(OH)2·8H2O) is a crystalline hydrate of strontium hydroxide, used in chemical synthesis and as a pH adjuster. It is a separate chemically defined compound of strontium, and hydrates of inorganic bases are covered by Chapter 28 Note 1(b).
2816.40.00Strontium Monoxide Technical Grade
Technical grade strontium monoxide (SrO) is an oxide of strontium used in ferrite magnets and television glass production. As a separate chemically defined oxide of strontium, it is classified under tariff item 2816.40.00.
2816.40.00Strontium Oxide Powder
Strontium oxide powder (SrO) is a white to yellowish powder used in glass manufacturing and pyrotechnics for its fluxing properties. As a separate chemically defined oxide of strontium, it falls under tariff item 2816.40.00.
2816.40.00Strontium Peroxide
Strontium peroxide (SrO2) is an inorganic peroxide used as a bleaching agent and in pyrotechnic compositions. As a peroxide of strontium, it is explicitly covered by tariff item 2816.40.00.
2816.40.00Synthetic Strontium Peroxide Crystals
Synthetic strontium peroxide crystals are employed in oxygen generation and bleaching applications. As a chemically defined peroxide of strontium, these crystals fall under tariff item 2816.40.00.
2816.40.00Technical Grade Barium Peroxide
Technical grade barium peroxide (85-90% BaO2) is an inorganic peroxide of barium used as an oxygen source in welding and bleaching applications. It is classified under tariff item 2816.40.00 as a peroxide of barium, provided it meets the criteria for Chapter 28 as a separate chemically defined compound or with permitted additions.