Other
Prepared binders for foundry molds or cores; chemical products and preparations of the chemical or allied industries (including those consisting of mixtures of natural products), not elsewhere specified or included: > Other: > Other: > Other: > Other: > Other: > Naphthenic acids, their water-insoluble salts and their esters > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 3824.99.75.50
Cobalt Naphthenate Catalyst for Polyester Resins
Cobalt naphthenate serves as an accelerator in unsaturated polyester resin curing for fiberglass composites. As a water-insoluble naphthenic acid salt, it fits HTS 3824.99.7550 for other such preparations. Used in boat building, automotive parts, and corrosion-resistant tanks.
Lead Naphthenate High-Temperature Lubricant Additive
Lead naphthenate provides extreme pressure protection in high-temperature greases and metalworking fluids as a naphthenic acid salt. HTS 3824.99.7550 includes such industrial water-insoluble salts. Applied in forging, drawing, and heavy machinery.
Calcium Naphthenate Rubber Vulcanization Accelerator
Calcium naphthenate accelerates sulfur vulcanization in tire and rubber compound production as a naphthenic metal salt. Falls under HTS 3824.99.7550 for other such preparations in polymer processing. Improves cure rate and scorch safety.
Naphthenic Acid Methyl Ester Biodiesel Solvent
Methyl esters of naphthenic acids used as co-solvents in biodiesel production to improve cold flow properties. Classified as HTS 3824.99.7550 other naphthenic esters for fuel applications. Derived from tall oil naphthenates via transesterification.
Iron Naphthenate Catalyst for Olefin Polymerization
Iron naphthenate functions as a single-site catalyst precursor in late-transition metal olefin polymerization for polyethylene production. HTS 3824.99.7550 covers other naphthenic salts in petrochemical catalysis. Enables branched polymer architectures.
Sodium Naphthenate Flotation Collector
Despite subheading focus on water-insoluble salts, sodium naphthenate (soluble variant) is sometimes included; used as ore flotation collector in mineral processing. HTS 3824.99.7550 for other naphthenic preparations in mining. Selectively floats copper/molybdenum sulfides.
Rare Earth Naphthenate Lamp Additive
Cerium/lanthanum naphthenates dope high-intensity discharge lamps for improved color rendering and efficiency. Water-insoluble salts under HTS 3824.99.7550 as other naphthenic preparations. Used in metal halide and sodium vapor lighting.
Aluminum Naphthenate Ink Modifier
Aluminum naphthenate modifies rheology and adhesion in lithographic and flexographic printing inks. HTS 3824.99.7550 for other naphthenic salts in graphic arts chemicals. Reduces misting and improves transfer.
Nickel Naphthenate Electroplating Brightener
Nickel naphthenate enhances brightness and leveling in nickel electroplating baths for decorative chrome applications. As water-insoluble naphthenic salt, under HTS 3824.99.7550 other preparations. Used in automotive trim and hardware plating.
Magnesium Naphthenate Fuel Anti-Static Agent
Magnesium naphthenate prevents static buildup in jet fuel and gasoline pipelines, reducing explosion risk. HTS 3824.99.7550 covers other naphthenic salts as pipeline additives. Meets ASTM D1655 aviation specs.
Copper Naphthenate Wood Preservative
Copper naphthenate is a water-insoluble salt of naphthenic acids used as an industrial wood preservative to protect against fungal decay and insect damage. It falls under HTS 3824.99.7550 as 'other' water-insoluble salts and esters of naphthenic acids not elsewhere specified. This formulation is typically applied via brushing or pressure treatment in construction and marine applications.
Zinc Naphthenate Anti-Corrosion Primer Additive
Zinc naphthenate, a water-insoluble metal salt of naphthenic acids, serves as a rust-inhibiting additive in industrial primers and paints. Classified under HTS 3824.99.7550 for other naphthenic acid salts used in protective coatings. It provides durable corrosion resistance on metal surfaces in automotive and marine sectors.
Barium Naphthenate Paint Dryer
Barium naphthenate acts as a polymerization catalyst and dryer in oil-based paints and inks, derived from water-insoluble naphthenic acid salts. It is covered by HTS 3824.99.7550 as other esters and salts of naphthenic acids for industrial use. This accelerates drying in alkyd formulations without affecting color.
Manganese Naphthenate Fuel Stabilizer
Manganese naphthenate, a naphthenic acid salt, functions as an oxidation inhibitor in diesel and aviation fuels to prevent gum formation. HTS 3824.99.7550 covers such other water-insoluble salts used in petroleum additives. It extends fuel shelf life in storage and transport.
Mixed Metal Naphthenate Dryer Blend
A blend of cobalt, manganese, and zirconium naphthenates used as a surface/through dryers in alkyd paints and varnishes. Covered under HTS 3824.99.7550 as other naphthenic acid salts/esters for industrial formulations. Balances drying speed and film properties.