5-Amino-2-(p-aminoanilino) benzenesulfonic acid; 4,4'-Diamino-3-biphenylsulfonic acid (3-Benzidinesulfonic acid); 3,3'-Dimethylbenzidine (o-Tolidine); 3,3'-Dimethylbenzidine hydrochloride; Ethyl-(2-dimethylaminoethyl) aniline;N-Ethyl-N,N'-dimethyl-N'-phenylethylene- diamine; and 4,4'-Methylenebis(2-chloroaniline)
Amine-function compounds > Aromatic polyamines and their derivatives; salts thereof: > Other: > 5-Amino-2-(p-aminoanilino) benzenesulfonic acid; 4,4'-Diamino-3-biphenylsulfonic acid (3-Benzidinesulfonic acid); 3,3'-Dimethylbenzidine (o-Tolidine); 3,3'-Dimethylbenzidine hydrochloride; Ethyl-(2-dimethylaminoethyl) aniline;N-Ethyl-N,N'-dimethyl-N'-phenylethylene- diamine; and 4,4'-Methylenebis(2-chloroaniline)
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 2921.59.08.00
3,3'-Dimethylbenzidine (o-Tolidine)
3,3'-Dimethylbenzidine, commonly known as o-Tolidine, is an aromatic polyamine used primarily as an intermediate in the production of azo dyes and pigments. It falls under HTS 2921.59.0800 as a specifically named aromatic polyamine derivative. This chemical is supplied in pure form or with stabilizers for safe transport.
3,3'-Dimethylbenzidine Hydrochloride
This is the hydrochloride salt form of 3,3'-Dimethylbenzidine, explicitly named in HTS 2921.59.0800, used in dye synthesis and analytical chemistry. The salt form enhances solubility and stability for industrial applications. It qualifies as an aromatic polyamine derivative salt under Chapter 29.
4,4'-Diamino-3-biphenylsulfonic Acid (3-Benzidinesulfonic Acid)
A sulfonated aromatic polyamine used as a dye intermediate, specifically listed under HTS 2921.59.0800. It features two amine groups and a sulfonic acid function on a biphenyl structure. Classified here as it qualifies as a derivative of aromatic polyamines.
5-Amino-2-(p-aminoanilino) Benzenesulfonic Acid
This complex aromatic polyamine with sulfonic acid substitution is explicitly named in HTS 2921.59.0800 for use in azo dye coupling. It contains multiple amine functions connected via anilino linkage on a benzenesulfonic acid core. Fits Chapter 29 as a chemically defined aromatic polyamine derivative.
4,4'-Methylenebis(2-chloroaniline)
Known as MOCA, this di-chloro substituted aromatic polyamine is listed in HTS 2921.59.0800, used as a curing agent in polyurethane production. Features methylene bridge between two chloroaniline units. Strictly controlled due to carcinogenicity but classified as aromatic polyamine.
Ethyl-(2-dimethylaminoethyl) Aniline
A tertiary amine derivative specifically enumerated in HTS 2921.59.0800, used as a dye intermediate and photographic chemical. Contains ethyl-aniline backbone with dimethylaminoethyl substituent. Qualifies as aromatic polyamine per Chapter 29 definitions.
N-Ethyl-N,N'-Dimethyl-N'-Phenylethylenediamine
Complex polyamine derivative listed under HTS 2921.59.0800, serving as an antioxidant in polymers and dye intermediate. Features ethylenediamine core with ethyl, dimethyl, and phenyl substituents. Pure compound classification under aromatic polyamines.