Mixtures of 1,3,6-naphthalenetrisulfonic acid and 1,3,7-naphthalenetrisulfonic acid
Sulfonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated: > Derivatives containing only sulfo groups, their salts and ethyl esters: > Mixtures of 1,3,6-naphthalenetrisulfonic acid and 1,3,7-naphthalenetrisulfonic acid
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 2904.10.15.00
Naphthyltrisulfonic Acid Mixture (1,3,6 & 1,3,7 Isomers)
This is a specific mixture of 1,3,6-naphthalenetrisulfonic acid and 1,3,7-naphthalenetrisulfonic acid isomers, classified under HTS 2904.10.15.00 as sulfonated derivatives of hydrocarbons containing only sulfo groups. It serves as a key intermediate in azo dye manufacturing, meeting Chapter 29 note (a) for separate chemically defined organic compounds.
Dye Coupling Grade Naphthalenetrisulfonic Acid Isomer Mix
Specialty isomer mixture (1,3,6- and 1,3,7-naphthalenetrisulfonic acids) optimized for diazo coupling in azo pigment production. HTS 2904.10.15.00 applies as chemically defined sulfonated naphthalene derivative per Chapter 29 exclusions from dyes.
1,3,6-1,3,7-NTS Acid for Acid Dyes
Mixture of naphthalenetrisulfonic acid isomers (1,3,6 & 1,3,7) used as diazo component in acid dye synthesis. Precisely matches HTS 2904.10.15.00 for mixtures of these specific sulfonated derivatives containing only sulfo groups.
1,3,6/1,3,7-Naphthalenetrisulfonic Acid Technical Grade
Technical grade mixture of 1,3,6- and 1,3,7-naphthalenetrisulfonic acid used in industrial dye synthesis. Falls under HTS 2904.10.15.00 per Chapter 29 scope for sulfonated hydrocarbon derivatives with only sulfo groups, excluding coloring matters of Chapter 32.
Industrial Naphthalene-1,3,6,7-Trisulfonic Acid Blend
Industrial-grade 50/50 blend of 1,3,6- and 1,3,7-naphthalenetrisulfonic acids for synthetic dye production. Classifies under HTS 2904.10.15.00 as the explicitly named mixture of these sulfonated hydrocarbon derivatives.