Thorium Dioxide Powder
High-purity thorium dioxide (ThO2), also known as thoria, used in gas mantles and high-temperature ceramics. Classified under HTS 2844.30.10.00 as a thorium oxide compound per Chapter 28 provisions for chemically defined inorganic compounds.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If prepared as glass frit or powder for ceramic use
Chapter notes exclude Chapter 28 compounds when prepared as prepared pigments or glass powders.
If spent thorium fuel residues from reactors
Radioactive residues are specifically under 2844.50, distinct from pure compounds.
If doped with impurities for electronic applications in wafer form
Chapter note specifies doped chemical elements in disc/wafer forms go to 3818.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Classify activity level (typically low for ThO2); use UN 2972 for transport if above exempt limits
• Provide certificates of analysis confirming thorium content and purity to meet 'chemically defined' criteria
• Avoid misclassification as ceramic powder (6903); specify chemical compound status in entry docs
Related Products under HTS 2844.30.10.00
Thorium Nitrate
Thorium nitrate (Th(NO3)4) is a chemically defined inorganic salt of thorium, used in chemical research and as a precursor for thorium-based ceramics. It falls under HTS 2844.30.10.00 as a thorium compound, specifically covered by Chapter 28 notes for metal salts and radioactive element compounds.
Thorium Sulfate Solution
Aqueous solution of thorium sulfate (Th(SO4)2), used in analytical chemistry and metal recovery. Classified in HTS 2844.30.10.00 as a thorium compound, chemically defined per Chapter 28.
Depleted Thorium Metal Powder
Powdered thorium metal depleted of short-lived isotopes, used in alloy research. HTS 2844.30.10.00 covers thorium and its compounds, including elemental forms as per heading scope.
Thorium Tungstate
Double salt thorium tungstate used in scintillation detectors. As a complex thorium compound, classified under HTS 2844.30.10.00 per Chapter note on complex salts.
High-Purity Thorium Chloride
Anhydrous thorium chloride (ThCl4) for organometallic synthesis. Chemically defined thorium compound under HTS 2844.30.10.00.
Thorium Acetylacetonate
Organothorium coordination compound used as catalyst precursor. Still classified as inorganic thorium compound under HTS 2844.30.10.00 per Chapter notes excluding organo-inorganics.