Other
Amine-function compounds > Aromatic polyamines and their derivatives; salts thereof: > o-, m-, p-Phenylenediamine, diaminotoluenes, and their derivatives; salts thereof: > Other: > 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 2921.51.50.00
o-Phenylenediamine
o-Phenylenediamine is a chemically defined aromatic polyamine with the formula C6H4(NH2)2, used primarily as an intermediate in the production of dyes, pigments, and pharmaceuticals. It falls under HTS 2921.51.5000 as an 'other' derivative of o-phenylenediamine, meeting Chapter 29's requirement for separate chemically defined organic compounds with amine functions.
p-Phenylenediamine Sulfate
p-Phenylenediamine sulfate is the salt of p-phenylenediamine, a key ingredient in oxidative hair dyes and rubber antioxidants. Classified under HTS 2921.51.5000 as an 'other' salt of phenylenediamine derivatives, per Chapter 29 note on classifying organic salts with the parent amine.
4-Amino-N-phenylaniline (PAD)
4-Amino-N-phenylaniline, also known as PAD, is a derivative of p-phenylenediamine used in dye manufacturing and polymer production. It qualifies under HTS 2921.51.5000 as an 'other' aromatic polyamine derivative, being a chemically defined compound in this heading.
2,4-Diaminotoluene (2,4-TDA)
2,4-Diaminotoluene is a diaminotoluene isomer used in polyurethane elastomers, dyes, and hair colorants. It is classified in HTS 2921.51.5000 as an 'other' derivative of diaminotoluenes, fitting Chapter 29's scope for aromatic amine-function compounds.
p-Phenylenediamine Dihydrochloride
p-Phenylenediamine dihydrochloride is a water-soluble salt form used in analytical chemistry and dye synthesis. Under HTS 2921.51.5000 as an 'other' salt thereof, per Chapter 29 classification rules for organic salts following the parent amine heading.
N,N'-Diphenyl-p-phenylenediamine (DPPD)
DPPD is a substituted p-phenylenediamine derivative serving as an antiozonant in tire rubber compounds. It falls under HTS 2921.51.5000 as an 'other' aromatic polyamine derivative, being chemically defined per Chapter 29 criteria.
2,5-Diaminotoluene Sulfate
2,5-Diaminotoluene sulfate is a salt used primarily in permanent hair coloring formulations. Classified in HTS 2921.51.5000 as an 'other' derivative salt of diaminotoluenes, compliant with Chapter 29 salt classification provisions.
m-Phenylenediamine (m-PDA)
m-Phenylenediamine is an aromatic meta-diamine used in epoxy resin hardeners and polyimide films. It is an 'other' phenylenediamine under HTS 2921.51.5000, as a separate chemically defined compound in this amine-function heading.
p-Aminodiphenylamine
p-Aminodiphenylamine serves as an intermediate for rubber antioxidants and dyes. As a derivative of p-phenylenediamine, it classifies under HTS 2921.51.5000 'other' aromatic polyamines and salts thereof.
1,4-Diaminobenzene (p-Phenylenediamine Base)
Pure 1,4-diaminobenzene, synonymous with p-phenylenediamine base, used in photographic chemicals and dyes. Falls in HTS 2921.51.5000 as 'other' in the phenylenediamine series, chemically defined per Chapter notes.