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.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified primarily by bismuth content rather than organic function
Inorganic bismuth compounds without qualifying organo-inorganic metal-carbon bonds fall in Chapter 28.
If when imported as CVD precursor mixture with stabilizers
Prepared chemical mixtures for specific industrial processes classified as preparations in 3824.
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Import Tips & Compliance
• Provide CVD process end-use documentation; may qualify for duty-free research exemptions under HTSUS
• Flammable solid—requires DOT SP 188 or UN-approved packaging with proper hazard class labeling
• Check REACH compliance if transshipping through EU; bismuth compounds increasingly scrutinized
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.
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.
Dimethylcadmium
Dimethylcadmium ((CH3)2Cd) is a pyrophoric organocadmium reagent with Cd-C bonds, used in semiconductor synthesis. Classified 2931.90.90 per chapter notes defining organo-inorganic metal-carbon compounds; excluded from Ch28 inorganics.