Other
Oxygen-function amino-compounds: > Amino-naphthols and other amino-phenols, other than those containing more than one kind of oxygen function, their ethers and esters; salts thereof: > Aminohydroxynaphthalenesulfonic acids and their salts: > Other: > 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 2922.21.50.00
Schaeffer's Acid (2-Naphthylamine-6-sulfonic acid)
Schaeffer's acid is an aminohydroxynaphthalenesulfonic acid used primarily as an intermediate in the production of azo dyes and pharmaceuticals. It features an amino group, hydroxyl group, and sulfonic acid group attached to a naphthalene ring, fitting Chapter 29 note (a) for chemically defined organic compounds. Classified under 2922.21.5000 as 'other' aminohydroxynaphthalenesulfonic acids and their salts.
Sodium Salt of 1-Amino-8-naphthol-3,6-disulfonic Acid (H Acid)
H Acid sodium salt is a critical coupling component for reactive dyes, featuring amino-hydroxy-disulfonic functions on naphthalene. It meets Chapter 29 criteria for chemically defined amino-oxygen compounds and their salts. Positioned in 2922.21.5000 as 'other' aminohydroxynaphthalenesulfonic acids.
K Acid (1-Naphthylamine-8-sulfonic Acid)
K Acid acts as a dye intermediate with amino and sulfonic groups on 1-naphthol structure. Meets definition of oxygen-function amino-compound under Chapter 29 notes. HTS 2922.21.5000 covers this as other aminohydroxynaphthalenesulfonic acid.
M Acid (1-Naphthylamine-5-sulfonic Acid)
M Acid provides amino-hydroxy-sulfonic functionality for naphthol AS dye series. Chemically defined per Chapter 29 (a), with oxygen-function amino characteristics. 2922.21.5000 classification for other such naphthalenesulfonic acids.
Tobias Acid (2-Naphthylamine-8-sulfonic acid)
Tobias acid serves as a key dye intermediate with amino, hydroxy, and sulfonic functionalities on naphthalene, used in acid dyes and optical brighteners. It qualifies as a separate chemically defined organic compound under Chapter 29. Falls under 2922.21.5000 for other aminohydroxynaphthalenesulfonic acids.
1-Naphthylamine-4-sulfonic Acid (Naphthionic Acid)
Naphthionic acid is an aminohydroxynaphthalenesulfonic acid derivative used in azo dye synthesis and pharmaceutical intermediates. Its structure includes amino and sulfonic acid groups on naphthalene with oxygen-function characteristics. Classified in 2922.21.5000 as other such compounds.
Gamma Acid (2-Amino-8-naphthol-6-sulfonic Acid)
Gamma acid functions as a dye coupler with amino, naphthol, and sulfonic acid groups, used in acid and direct dyes. As a pure organic compound with oxygen-function amino groups, it aligns with Chapter 29 scope. Falls under 2922.21.5000 for other such acids.
J Acid (2-Naphthylamine-7-sulfonic Acid)
J Acid is an aminonaphtholsulfonic acid serving as an intermediate for azo dyes and pigments. It contains the requisite amino, hydroxy (via naphthol), and sulfonic functions on naphthalene. Classified under HTS 2922.21.5000 as other aminohydroxynaphthalenesulfonic acids.