Cerium(IV) Oxide Powder (CeO2)
High-purity cerium(IV) oxide powder, also known as ceria, used primarily as a polishing agent for glass and semiconductor surfaces. It falls under HTS 2846.10.00.10 as a chemically defined cerium oxide compound of rare-earth metals. The fine particle size enables precise abrasive action without scratching.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If contaminated with other rare-earth oxides exceeding 10%
Impure mixtures of rare-earth oxides fall under barium or other metal oxides rather than specific cerium compounds.
If when pre-mixed as refractory polishing compound for retail sale
Prepared polishing mixtures containing cerium oxide are classified as refractory cements, not pure chemical compounds.
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Import Tips & Compliance
• Verify purity certificate (typically >99%) to confirm classification as chemically defined cerium oxide under Chapter 28 notes
• Include safety data sheets (SDS) for oxidizing properties; common pitfall is mislabeling as general rare-earth mixture
• Check REACH/ TSCA compliance for US entry; bulk shipments require proper ventilation to prevent dust hazards
Related Products under HTS 2846.10.00.10
Cerium Dioxide Catalyst Grade
Cerium dioxide (CeO2) in nanoparticulate form optimized for automotive catalytic converters and fuel cell applications. Classified under HTS 2846.10.00.10 as a pure cerium oxide of rare-earth metals per Chapter 28 definitions. Its oxygen storage capacity makes it essential for emissions control.
Ceric Ammonium Nitrate (CAN) Precursor Oxide
Cerium oxide specifically processed as precursor for ceric ammonium nitrate used in organic synthesis and glass polishing. Meets HTS 2846.10.00.10 as chemically defined cerium oxide compound. High reactivity enables conversion to soluble cerium(IV) salts.
UV-Blocking Cerium Oxide for Glass
Specialty cerium(IV) oxide doped for UV absorption in automotive and architectural glass production. Classified under HTS 2846.10.00.10 as pure cerium oxide compound. Doping maintains chemical definition while enhancing solar protection properties.
High-Purity Cerium Oxide 99.999% (5N)
Ultra-high purity (5N) cerium oxide for semiconductor polishing slurries and optical coating deposition. Falls under HTS 2846.10.00.10 as chemically defined rare-earth oxide with minimal impurities (<10 ppm total). Critical for defect-free wafer processing.
Polishing Grade Ceria for Precision Optics
Calcined cerium oxide optimized for polishing telescope mirrors, laser optics, and ophthalmic lenses. HTS 2846.10.00.10 classification as pure cerium oxide per Chapter 28 notes. Particle distribution (1-3 microns) ensures scratch-free high-gloss finish.
Fuel Cell Grade Cerium Oxide Electrolyte
Dense cerium oxide powder for solid oxide fuel cell electrolytes, doped with gadolinium for ionic conductivity. Still classified under HTS 2846.10.00.10 as base cerium oxide compound. Enables operation at intermediate temperatures (500-700°C).