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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If used in resin-based paints
Solutions/dispersions in water for paints shift to Chapter 32 subheadings.
If for other metal carboxylates
Non-naphthenic acid metal salts classify under different fatty acid provisions.
If primarily cyclic alcohol derivatives
Pure organic derivatives without metal salt form go to Chapter 29.
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Import Tips & Compliance
• 12% max cobalt content typical—verify via ICP analysis for duty-free claims if applicable
• Hazardous material declaration for flammability; pair with MEKP hardener docs
• Avoid 2852 classification—it's organic salt, not inorganic compound
Related Products under HTS 3824.99.75.50
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.