Other
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Duty Rate (from China)
Except as provided in headings 9903.88.33, 9903.88.34, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(g) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(g)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified under HTS 2931.90.90.52
Tetraethyl Lead Additive
Tetraethyl lead (TEL) is an organo-inorganic compound used historically as an anti-knock additive in gasoline, containing lead atoms directly linked to carbon. It falls under HTS 2931.90.90.52 as 'other organo-inorganic compounds' per Chapter 29 notes defining compounds with nonmetals or metals directly bonded to carbon. Excluded from other headings due to its specific organometallic structure.
Trimethylindium Precursor
Trimethylindium (TMIn) is a volatile organo-indium compound used in metal-organic chemical vapor deposition (MOCVD) for semiconductor production. Classified under 2931.90.90.52 as an organo-inorganic compound with direct indium-carbon bonds, fitting Chapter 29 definitions excluding sulfonated/halogenated derivatives.
Triphenylbismuth Catalyst
Triphenylbismuth is an organobismuth compound used as a catalyst in organic synthesis and polymer production. It qualifies for 2931.90.90.52 as an organo-inorganic compound with bismuth directly linked to carbon atoms, per Chapter 29 note definitions.
Cyclopentadienyl Manganese Tricarbonyl
Cyclopentadienyl manganese tricarbonyl (CMT) is an organometallic compound used as an antiknock additive in fuels (MMT precursor). Falls under 2931.90.90.52 as 'other organo-inorganic compounds' with manganese-carbon bonds directly linked.
Dimethylcadmium Reagent
Dimethylcadmium is a highly reactive organocadmium compound used in organometallic synthesis and semiconductor production. Classified in 2931.90.90.52 as an organo-inorganic compound with cadmium atoms directly bonded to carbon.
Allylchlorosilane Intermediate
Allylchlorosilane (chlorodimethylallylsilane) is an organosilicon compound used in silicone polymer synthesis. Falls under 2931.90.90.52 as an organo-inorganic compound with silicon-halogen-carbon structure, excluded from organo-sulfur classification.
Methyltriphenylphosphonium Bromide
Methyltriphenylphosphonium bromide is a phosphonium salt used in Wittig reagent preparation for olefin synthesis. Classified under 2931.90.90.52 as an organo-inorganic compound per Chapter 29 note (C)(1) for organic salts.
Tributyltin Chloride Stabilizer
Tributyltin chloride is an organotin compound used as a PVC stabilizer and biocide. Falls under 2931.90.90.52 as an organo-inorganic compound with tin-carbon bonds, distinguished from sulfonated derivatives.
Diethylphosphinic Acid
Diethylphosphinic acid is an organophosphorus compound used as flame retardant in polymers. Classified in 2931.90.90.52 as organo-inorganic acid-function compound not covered by earlier P-specific headings.
Vinyltrichlorosilane Monomer
Vinyltrichlorosilane is a reactive organosilicon monomer for silicone rubber production. Falls under 2931.90.90.52 as organo-inorganic compound with Si-Cl and vinyl functionality.
Methylcyclopentadienyl Manganese Tricarbonyl
Methylcyclopentadienyl manganese tricarbonyl (MMT) is an organomanganese fuel additive replacing lead compounds. Classified 2931.90.90.52 as organo-inorganic with Mn-C bonds.
Triethylaluminum Cocatalyst
Triethylaluminum is a pyrophoric organoaluminum compound used as Ziegler-Natta cocatalyst in polyolefin production. 2931.90.90.52 classification for Al-C organo-inorganic compounds.
Phenylmercuric Acetate Fungicide
Phenylmercuric acetate is an organomercury compound used as mildewcide in paints and fungicide. Despite heading 2931.00 provisions, specific mercury compounds fall in 2931.90.90.52.
Dibutyltin Dilaurate Catalyst
Dibutyltin dilaurate (DBTDL) is an organotin catalyst for silicone and polyurethane curing. 2931.90.90.52 as organo-inorganic ester of carboxylic acid per Chapter 29 note 5(A).
Trimethylgallium Precursor
Trimethylgallium (TMGa) is an organogallium precursor for GaAs/GaN semiconductor epitaxy via MOCVD. Classified 2931.90.90.52 as organo-inorganic with Ga-C bonds.