Other
Sulphides; polysulphides, whether or not chemically defined. > Other > Other
Duty Rate (from China)
Subheadings
Products classified under Tariff item 2830.90.00
99.99% Pure Luminescent ZnS for OLED Displays
Ultra-pure zinc sulfide powder with a purity of at least 99.99%, designated for use as a luminescent material in OLED display manufacturing. This chemically defined compound of zinc and sulfur falls under tariff item 2830.90.00 as a sulphide other than those specifically enumerated elsewhere in Chapter 28.
Cadmium Sulfide for Glass Coloring
Cadmium sulfide specifically for producing stable yellow colors in glass tableware and decorative bottles. This chemically defined sulphide is classifiable under tariff item 2830.90.00 as an other sulphide, as it is not a finished pigment preparation.
Cadmium Sulfide Luminescent Grade
Specially prepared cadmium sulfide activated for phosphorescence in glow-in-the-dark paints and safety markings. While activated, it may still be classifiable under tariff item 2830.90.00 if the activation does not render it a prepared luminophore of heading 32.06.
Doped Luminescent ZnS Powder 99.99% Base Purity
Zinc sulfide powder with a 99.99% base purity, lightly doped to achieve specific emission wavelengths for display applications. The dopant level is minimal and does not alter the chemically defined nature of the zinc sulfide, keeping it classifiable under tariff item 2830.90.00.
High-Purity Zinc Sulfide (99.99%) for Thin Films
Ultra-pure zinc sulfide granules for physical vapor deposition (PVD) in optical thin films. This chemically defined sulphide is classifiable under tariff item 2830.90.00, as it is not in a worked form excluded by Chapter 28 notes.
High-Purity ZnS Luminescent Crystals (99.99%)
Crystalline zinc sulfide of luminescent grade with purity exceeding 99.99%, used as a scintillator material in radiation detection equipment. As a chemically defined inorganic sulphide, it is classifiable under tariff item 2830.90.00, provided it is not in a worked form excluded by Chapter 28 notes.
Luminescent Grade Zinc Sulfide Powder (99.99% Purity)
High-purity zinc sulfide powder, luminescent grade with 99.99% or more purity, used in the production of phosphors for displays and lighting. This chemically defined compound is classifiable under tariff item 2830.90.00 as a sulphide other than those specifically listed elsewhere.
Luminescent ZnS Pellets 99.99% for Vapor Deposition
Pelletized zinc sulfide, luminescent grade at 99.99% purity, used as an evaporation source material for thin-film luminescent coatings. The pellets are a chemically defined sulphide in a physical form suitable for deposition, classifiable under tariff item 2830.90.00.
Phosphor-Grade Zinc Sulfide Granules 99.99% Pure
Granular zinc sulfide, luminescent grade at 99.99% purity or higher, used in manufacturing cathode ray tube phosphors and fluorescent lamps. This chemically defined sulphide is classifiable under tariff item 2830.90.00 as an other sulphide.
Scintillation-Grade Zinc Sulfide 99.99% Purity
Zinc sulfide of luminescent grade with 99.99% or greater purity, optimized for scintillation screens in medical imaging devices. As a chemically defined inorganic sulphide, it is classifiable under tariff item 2830.90.00, provided it is imported in bulk form and not as part of a finished device.
Synthetic Zinc Sulfide Crystals
Laboratory-grown zinc sulfide single crystals used in infrared optics and laser components. These crystals are a chemically defined sulphide, classifiable under tariff item 2830.90.00, provided they are not cut into optical elements.
Ultra-High Purity Luminescent Zinc Sulfide (5N Grade)
5N (99.999%) luminescent grade zinc sulfide, exceeding the 99.99% threshold, for advanced phosphor applications in lasers. This ultra-high-purity chemically defined compound is classifiable under tariff item 2830.90.00 as a sulphide.
Zinc Sulfide Nanopowder
Ultrafine zinc sulfide particles (<100nm) for quantum dot synthesis and anti-reflective coatings. This nanopowder is a chemically defined sulphide, classifiable under tariff item 2830.90.00, as particle size does not affect its chemical definition.
Zinc Sulfide Phosphor Precursor
Refined zinc sulfide used to produce ZnS:Cu/Au phosphors for electroluminescent panels. In its unactivated state, this product is a chemically defined sulphide, classifiable under tariff item 2830.90.00.
Zinc Sulfide Powder (Luminescent Grade)
High-purity zinc sulfide powder used as a phosphor precursor in manufacturing glow-in-the-dark materials and fluorescent pigments. This chemically defined sulphide is classifiable under tariff item 2830.90.00.