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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If natural mineral scheelite ore
Natural tungsten-bearing ores are classified in Chapter 26, not as chemically defined compounds.
If cut and polished as synthetic gemstones
Synthetic precious/semi-precious stones fall under Chapter 71 per chapter exclusions.
If in powder/granule form for ceramic pigments
Glass frit and inorganic pigments in powder form excluded to heading 3207.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Provide synthesis certificates differentiating from natural scheelite ore (2613); assay reports confirming >95% CaWO4
• Pitfall: natural impurities may trigger mineral headings
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.
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.