Naphthenic acids
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 > Naphthenic acids
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 3824.99.75.10
Industrial Grade Naphthenic Acid 75%
High-purity naphthenic acid derived from petroleum distillates, primarily used as a corrosion inhibitor and paint drier in industrial formulations. Classified under HTS 3824.99.7510 as pure naphthenic acids, distinct from their salts or esters. Their carboxylic acid structure enables metal complexing for anti-corrosion applications.
Refined High Acid Number Naphthenic Acid
Distilled naphthenic acid with acid number 200-250 mg KOH/g, used in metalworking fluids and rubber additives. Falls under HTS 3824.99.7510 as their water-insoluble salts are separately classified. Key for emulsifiers in oil-based formulations.
Low Odor Naphthenic Acid for Paint Driers
Specially processed naphthenic acid with minimized odor for use in alkyd paint driers and inks. HTS 3824.99.7510 covers the pure acid form before salt formation. Provides essential carboxylic functionality for metal soap production.
Technical Grade Naphthenic Acid (60% Assay)
Standard technical naphthenic acid at 60% minimum assay from heavy petroleum distillates, for wood preservatives and fuel additives. Pure acid classification under 3824.99.7510 excludes formulated products. Versatile for salt formation and emulsification.
Distilled Naphthenic Acid for Rubber Accelerator
Fractionally distilled naphthenic acid for rubber vulcanization accelerators and plasticizers. HTS 3824.99.7510 specifically identifies the acid before reaction with amines or metals. Narrow boiling range ensures processing consistency.