Calcium Tungstate Luminescent Powder
Fine calcium tungstate powder activated for blue luminescence in cathode ray tubes and lighting phosphors. Falls under HTS 2841.80.0020 as a chemically defined tungstate of calcium per Chapter 28 notes. Used in legacy display technologies and specialty lighting.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If when prepared specifically as luminophores
Chapter note excludes luminophore products from Chapter 28, directing them to heading 3206.
If containing phosphides or other Chapter 28 exclusions
Certain complex inorganic compounds fall under 2853 per chapter note.
If mistaken for other carbides or tungsten compounds
Carbides and related tungsten compounds have separate classifications in 2849.
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Import Tips & Compliance
• Document activator levels to maintain pure compound status; avoid retail packaging that triggers 3824
• Ensure particle size specs match technical data sheets for customs verification
Related Products under HTS 2841.80.00.20
Calcium Tungstate Powder
Pure calcium tungstate (CaWO4) powder, a chemically defined salt of tungstic acid, used in the production of phosphors for fluorescent lamps and X-ray screens. It falls under HTS 2841.80.0020 as a tungstate of calcium. This inorganic compound is essential for luminescent applications due to its scintillation properties.
Calcium Tungstate Scintillation Crystals
Synthetic single crystals of calcium tungstate grown for use as scintillation detectors in radiation measurement equipment. Classified under HTS 2841.80.0020 as chemically defined calcium tungstates. These crystals emit light when exposed to ionizing radiation, vital for medical imaging and particle physics.
Technical Grade Calcium Tungstate
Technical grade calcium tungstate granules used as a flux in welding electrodes and metallurgy to stabilize tungsten content. It qualifies for HTS 2841.80.0020 as a salt of peroxometallic acid (tungstate) of calcium. This form provides controlled tungstate release in high-temperature applications.
Synthetic Scheelite Calcium Tungstate
Synthetic scheelite, the mineral form of calcium tungstate (CaWO4), produced for phosphor manufacturing and gemstone simulation. Classified in HTS 2841.80.0020 as chemically defined calcium tungstates. Distinguished from natural mineral ores by laboratory synthesis.