Bis(cyclopentadienyl)zirconium Dichloride
Zirconocene dichloride (Cp2ZrCl2) is a metallocene polymerization catalyst with Zr-C bonds, classified 2931.90.90 as other organo-inorganic compounds. Chapter note III(A) confirms classification with organic component in latest numerical heading.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If inorganic zirconium chlorides
Simple ZrCl4 without organic ligands properly classified as chlorides.
If as complete polymerization catalyst preparation
Antioxidant/stabilizer mixtures containing organometallics classifiable in 3812.
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Import Tips & Compliance
• Air/moisture-sensitive; requires Schlenk flask packaging with desiccant documentation
• Commonly misclassified as 2827 zirconium chlorides—insist on metallocene organometallic status
• Olefin catalyst end-use letter supports correct 2931 classification
Related Products under HTS 2931.90.90
Tetraethyl Lead (TEL)
Tetraethyl lead is an organo-inorganic compound where lead atoms are directly linked to carbon in ethyl groups, used historically as an antiknock additive in gasoline. It falls under HTS 2931.90.90 as 'other organo-inorganic compounds' since it contains a metal (lead) directly bonded to carbon and doesn't fit specific subheadings. The chapter notes confirm classification in heading 2931 for such metal-carbon bonded compounds.
Trimethyl Bismuth
Trimethyl bismuth (Bi(CH3)3) is a volatile organobismuth compound with bismuth-carbon bonds, used in MOCVD semiconductor manufacturing. Classified under 2931.90.90 as other organo-inorganic compounds per chapter notes defining heading 2931 for metal-carbon linkages. Excluded from organosulfur (2930) or heterocyclic categories.
Triphenyl Antimony
Triphenyl antimony (SbPh3) features antimony-carbon bonds characteristic of organo-inorganic compounds in heading 2931. Used as a catalyst in PET resin production and flame retardant intermediate. Falls in 2931.90.90 as it doesn't match specific organo-inorganic subheadings.
Methylcyclopentadienyl Manganese Tricarbonyl
MCDC (methylcyclopentadienyl manganese tricarbonyl) is an organomanganese fuel additive with Mn-C bonds, qualifying as organo-inorganic under 2931.90.90. Used as MMT gasoline antiknock agent; chapter notes exclude it from hydrocarbon (Ch27) or inorganic metal (Ch28) classifications.
Tributyl Tin Chloride
Tributyltin chloride (Bu3SnCl) contains tin-carbon bonds defining organo-inorganic classification under heading 2931. Used as biocide intermediate and PVC stabilizer precursor. 2931.90.90 as other, since not specifically enumerated; chapter notes exclude halogenated organics without metal-carbon bonds.
Cyclopentadienyl Iron Dicarbonyl Dimer
This ferrocene derivative [(CpFe(CO)2)2] features iron-carbon bonds in cyclopentadienyl rings, qualifying as organo-inorganic under 2931.90.90. Used in specialty polymer catalysis; chapter note III(C) prioritizes latest numerical heading.