Gadolinium-Terbium Carbonate Alloy Mixture
Specialty mixture of gadolinium and terbium carbonates without cerium, applied in magnetic resonance imaging contrast agents and magneto-optical devices. Classified under HTS 2846.90.80.75 as other rare-earth carbonate mixtures, within inorganic compounds of rare-earth metals per Chapter 28 notes. Chemically defined, excluding radioactive isotopes (2844).
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified as individual heavy rare-earth carbonate compounds
Heavy rare-earths like gadolinium/terbium have specific 'other compounds' subheading 2846.90.75, distinct from mixtures.
If converted to sulfides
Sulfides of rare-earths fall under 2830, as headings 2826-2842 cover specific salts by anion type.
If incorporated into finished medical imaging devices
Chapter 28 excludes finished articles; medical instruments go to Chapter 90.
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Import Tips & Compliance
• Ensure NMR purity specs in COA; impurities >1% may reclassify as preparations under 3824
• Radioactivity testing required—confirm <74 Bq/g to avoid 2844 for residues or isotopes
• Partner with licensed customs brokers experienced in Chapter 28 for precise entry summaries
Related Products under HTS 2846.90.80.75
Lanthanum-Yttrium Rare Earth Carbonate Mixture
A chemically defined mixture of lanthanum and yttrium carbonates, excluding cerium, used primarily in the production of phosphors for lighting and displays. This falls under HTS 2846.90.80.75 as a mixture of rare-earth carbonates other than cerium carbonate, classified in Chapter 28 for inorganic compounds of rare-earth metals. It meets the criteria for chemically defined compounds per subheading note to 2852.10, but is specifically covered here.
Neodymium-Praseodymium Carbonate Blend
Industrial-grade blend of neodymium and praseodymium carbonates (no cerium), utilized as a precursor in manufacturing permanent magnets like NdFeB. Classified under HTS 2846.90.80.75 for mixtures of rare-earth carbonates other than cerium carbonate, as inorganic compounds of rare-earth metals per Chapter 28. Excludes organic derivatives covered elsewhere.
Mixed Rare-Earth Carbonates (La-Nd-Y Free of Cerium)
A balanced mixture of light rare-earth carbonates including lanthanum, neodymium, and yttrium (cerium-free), used in ceramics and glass polishing compounds. Falls under HTS 2846.90.80.75 for other mixtures of rare-earth carbonates, as per Chapter 28 for chemically defined inorganic compounds. Not covered by organic or excluded categories.
Yttrium-Europium Carbonate Mixture
Mixture of yttrium and europium carbonates, free of cerium, employed in phosphor production for LED lighting and fluorescent lamps. This product is classified in HTS 2846.90.80.75 as 'other' mixtures of rare-earth carbonates, fitting Chapter 28's scope for inorganic rare-earth compounds. It adheres to chemical definition standards excluding luminophores (3206).