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Chapter 28 - HTS Codes for Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes
Rare gases excluding argon, helium, neon, and high purity isotopically pure rare gases
Silicon containing by weight less than 100 percent but not less than 99 percent of silicon
Rare-earth metals consisting of lanthanum which are not intermixed or interalloyed
Rare-earth metals consisting of praseodymium which are not intermixed or interalloyed
Rare-earth metals consisting of neodymium which are not intermixed or interalloyed
Rare-earth metals excluding lanthanum, cerium, praseodymium, and neodymium which are not intermixed or interalloyed
Phosphoric acid of fertilizer grade containing less than 65 percent available diphosphorus pentaoxide equivalents
Phosphoric acid of fertilizer grade containing 65 percent or more available diphosphorus pentaoxide equivalents
Inorganic acids excluding hydrogen fluoride, hydrogen cyanide, arsenic acid, and hydrobromic acid
Inorganic acids excluding hydrogen fluoride, hydrogen cyanide, arsenic acid, hydrobromic acid, and sulfamic acid
Inorganic oxygen compounds of nonmetals consisting of silicon dioxide excluding synthetic silica gel
Inorganic oxygen compounds of nonmetals excluding carbon dioxide, silicon dioxide, arsenic trioxide, selenium dioxide, and sulfur dioxide
Chlorides and chloride oxides consisting of carbonyl dichloride also known as phosgene
Chlorides and chloride oxides excluding phosgene, phosphorous oxychloride, phosphorous trichloride, phosphorous pentachloride, sulfur monochloride, sulfur dichloride, and thionyl chloride
Sulfides of nonmetals excluding carbon disulfide and sulfides of arsenic or phosphorus
Artificial corundum in grains, ground, pulverized, or refined form whether or not chemically defined
Artificial corundum in grains, ground, or pulverized form being white, pink, or ruby and containing more than 98 percent by weight of aluminum oxide
Artificial corundum in grains, ground, or pulverized form excluding specified white, pink, or ruby high purity varieties
Earth colors containing 70 percent or more by weight of combined iron evaluated as iron oxide
Inorganic bases and metal oxides, hydroxides, and peroxides excluding hydrazine, hydroxylamine, lithium, vanadium, nickel, copper, germanium, zirconium, molybdenum, antimony, beryllium, niobium, tin, tungsten, and cadmium
Complex fluorine salts excluding fluorosilicates of sodium or potassium and specified fluorides of aluminum, ammonium, and sodium
Chlorides excluding those of magnesium, aluminum, nickel, vanadium, tin, titanium, tungsten, barium, iron, cobalt, and zinc
Bromides and bromide oxides excluding those of sodium, potassium, ammonium, calcium, and zinc
Chlorates, perchlorates, bromates, perbromates, iodates, and periodates excluding specified sodium and potassium salts
Zinc sulfide of luminescent grade having a purity of 100 percent or more by weight
Sulfates excluding those of magnesium, aluminum, nickel, copper, barium, cobalt, iron, vanadium, chromium, and zinc
Peroxosulfates also known as persulfates excluding those of sodium, potassium, and ammonium
Phosphinates also known as hypophosphites and phosphonates also known as phosphites
Phosphates excluding specified sodium, potassium, calcium, aluminum, and ammonium salts
Carbonates and peroxocarbonates "percarbonates"; commercial ammonium carbonate containing ammonium carbamate (excluding disodium carbonate, sodium hydrogencarbonate "sodium bicarbonate", potassium carbonates, calcium carbonate, barium carbonate, lithium carbonates, strontium carbonate and inorganic or organic compounds of mercury)
Carbonates and peroxocarbonates excluding sodium, potassium, calcium, barium, lithium, strontium, cobalt, bismuth, ammonium, and lead salts
Chromates, dichromates, and peroxochromates excluding sodium and potassium dichromate
Manganites, manganates, and permanganates excluding potassium and sodium permanganate
Salts of oxometallic or peroxometallic acids excluding specified molybdates, tungstates, vanadates, and chromates
Double or complex silicates including aluminosilicates whether or not chemically defined
Salts of inorganic acids or peroxoacids excluding double or complex silicates, fulminates, cyanates, and thiocyanates
Compounds of precious metals and amalgams of precious metals excluding silver and gold compounds
Natural uranium alloys, dispersions, ceramic products, and mixtures excluding uranium metal and compounds
Uranium enriched in uranium 235 and its compounds, plutonium and its compounds, and mixtures containing these products
Plutonium and its compounds and mixtures containing enriched uranium or plutonium excluding specified uranium oxide and fluoride compounds
Uranium depleted in uranium 235 metal and alloys, dispersions, ceramic products, and mixtures excluding specified compounds
Radioactive mixtures, alloys, and ceramic products containing depleted uranium or thorium excluding specified metal and compounds
Radioactive elements, isotopes and compounds, and alloys and dispersions, incl. cermets, ceramic products and mixtures, containing these elements, isotopes and compounds; radioactive residues (excluding natural uranium, uranium enriched and depleted in u 235; plutonium, thorium and compounds of these products)
Radioactive elements and isotopes and compounds other than natural, enriched, or depleted uranium, consisting of tritium and its compounds, including alloys, dispersions, ceramic products and mixtures containing tritium or its compounds
Americium-241, californium-252, curium-244, cesium-137, gadolinium-153, iridium-192, promethium-147, radium-226, selenium-75, or ytterbium-169
Radioactive elements and isotopes and compounds other than natural, enriched, or depleted uranium, consisting of elements, isotopes and compounds other than those specifically listed for cobalt 60 or other named radioactive species
Radioactive elements and isotopes and compounds other than natural, enriched, or depleted uranium, consisting of alloys, dispersions, ceramic products and mixtures containing radioactive elements, isotopes or compounds
Isotopes other than those of heading 2844 and compounds, inorganic or organic, of such isotopes, whether or not chemically defined, other than heavy water, boron enriched in boron 10, lithium enriched in lithium 6, or helium 3
Mixtures of rare-earth oxides or rare-earth chlorides excluding cerium oxides and chlorides
Rare-earth oxides excluding cerium oxides and containing lanthanum as the predominant metal
Rare-earth oxides excluding cerium oxides and containing yttrium or scandium as the predominant metal
Rare-earth oxides excluding cerium oxides and excluding those with lanthanum, yttrium, or scandium as the predominant metal
Rare-earth chlorides excluding cerium chlorides and containing yttrium or scandium as the predominant metal
Rare-earth chlorides excluding cerium chlorides and excluding those with yttrium or scandium as the predominant metal
Yttrium bearing materials and compounds containing by weight more than 19 percent but less than 85 percent yttrium oxide equivalent
Compounds and mixtures of rare-earth metals, yttrium, or scandium excluding cerium compounds and specified mixtures
Mixtures of rare-earth carbonates excluding cerium carbonate and containing lanthanum as the predominant metal
Mixtures of rare-earth carbonates excluding cerium carbonate and excluding those with lanthanum as the predominant metal
Rare-earth compounds and yttrium or scandium compounds excluding cerium compounds, specified oxides, chlorides, and carbonates
Hydrides, nitrides, azides, silicides, and borides excluding those of calcium, titanium, tungsten, and vanadium
Chemically defined mercury compounds consisting of mercuric oxide, mercuric cyanide, mercuric oxycyanide, and mercuric potassium cyanide
Chemically defined mercury compounds excluding specified mercuric oxides and cyanides
Inorganic or organic compounds of mercury excluding amalgams and chemically defined mercury oxides, cyanides, albuminates, tannates, and phosphides
Phosphides of copper also known as phosphor copper containing more than 15 percent by weight of phosphorus
Inorganic compounds, liquid air, compressed air, and amalgams excluding specified phosphides and cyanogen chloride
Inorganic compounds and amalgams excluding specified copper and other phosphides, cyanogen chloride, and gallium arsenide wafers