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Amine-function compounds. > Aromatic polyamines and their derivatives; salts thereof: > Other > Other
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Subheadings
Products classified under Tariff item 2921.59.00
1,4-Diaminobenzene-2-Sulfonic Acid
1,4-Diaminobenzene-2-sulfonic acid is an aromatic diamine with a sulfonic acid substituent, used as a building block for azo dyes and pharmaceutical intermediates. It is classified under tariff item 2921.59.00 as an 'other' aromatic polyamine.
1,8-Diaminonaphthalene Technical Grade
1,8-Diaminonaphthalene technical grade is a chemically defined aromatic polyamine used in polymer and dye manufacturing. It falls under tariff item 2921.59.00 as an 'other' aromatic polyamine derivative, not specifically named elsewhere in the subheading.
1,8-Diaminonaphthalene with Stabilizer
Stabilized 1,8-diaminonaphthalene includes anticaking agents necessary for preservation during transport, as permitted by Chapter 29 Note 1(f). It remains a chemically defined aromatic polyamine and is classified under tariff item 2921.59.00 as an 'other' derivative.
1,8-Naphthalenediamine
1,8-Naphthalenediamine, also known as 1,8-diaminonaphthalene, is a chemically defined aromatic polyamine with the molecular formula C10H12N2. It is classified under tariff item 2921.59.00 as an 'other' aromatic polyamine, not specifically named elsewhere.
1,8-Naphthalenediamine Flake Form
Flake-form 1,8-naphthalenediamine is a solid aromatic polyamine used in pharmaceutical intermediates and polymers. It is classified under tariff item 2921.59.00 as an 'other' aromatic polyamine, regardless of physical form, as long as it is chemically defined.
2,2'-Dichlorobenzidine
2,2'-Dichlorobenzidine is a halogenated aromatic polyamine used in azo pigment manufacturing. It is a chemically defined organic compound with two chlorine atoms on a benzidine core. As a halogenated derivative of an aromatic polyamine, it is classified under tariff item 2921.59.00.
2,4,6-Trichloro-1,3-diaminobenzene
2,4,6-Trichloro-1,3-diaminobenzene is a highly chlorinated aromatic polyamine used as an intermediate in specialty herbicides and dye production. Its amine-function groups and aromatic structure place it under tariff item 2921.59.00 for other aromatic polyamines and their derivatives.
2,4-Diaminotoluene
2,4-Diaminotoluene is an aromatic polyamine used as an intermediate in toluene diisocyanate (TDI) production and in hair dye formulations. Its two amine groups on a toluene ring classify it under tariff item 2921.59.00 for other aromatic polyamines.
3,3'-Diaminobenzidine (Tetraaminobiphenyl)
3,3'-Diaminobenzidine, also known as tetraaminobiphenyl, is a chemically defined aromatic polyamine with four amine groups on a biphenyl backbone. It is used primarily as a monomer in the production of polybenzimidazole polymers and other high-performance engineering plastics. As an aromatic polyamine and its derivatives, it falls under tariff item 2921.59.00.
3,3'-Dichloro-4,4'-diaminodiphenylmethane
3,3'-Dichloro-4,4'-diaminodiphenylmethane is a chlorinated aromatic polyamine used as a curing agent for epoxy resins and polyurethane systems. Its structure, with two amine groups on a diphenylmethane backbone, places it under tariff item 2921.59.00.
3,3'-Dichlorobenzidine Dihydrochloride
3,3'-Dichlorobenzidine dihydrochloride is a double-salt derivative of a di-chlorinated aromatic polyamine, used in azo pigment synthesis. The organic polyamine component determines classification under tariff item 2921.59.00.
3,3'-Dimethylbenzidine Hydrochloride
3,3'-Dimethylbenzidine hydrochloride is the hydrochloride salt of 3,3'-dimethylbenzidine, an aromatic polyamine used in dye synthesis. Under Chapter 29 Note 5(C), salts of organic bases are classified with the organic compound, so it falls under tariff item 2921.59.00.
3,3'-Dimethylbenzidine (o-Tolidine)
3,3'-Dimethylbenzidine, also known as o-tolidine, is an aromatic polyamine used as an intermediate in azo dye and pigment production. It is classified under tariff item 2921.59.00 as an 'other' aromatic polyamine derivative.
4,4'-Benzidine-2,2'-Disulfonic Acid
4,4'-Benzidine-2,2'-disulfonic acid is a chemically defined aromatic polyamine derivative featuring two sulfonic acid groups on a benzidine core. It is used primarily as an intermediate in the synthesis of dyes and pigments. As an aromatic polyamine derivative, it is classified under tariff item 2921.59.00.
4,4'-Diamino-2,2'-stilbenedisulfonic acid
4,4'-Diamino-2,2'-stilbenedisulfonic acid is a chemically defined aromatic polyamine derivative with two amino groups and two sulfonic acid groups on a stilbene backbone. It is used as a dye precursor and in optical brightener production. As an aromatic polyamine derivative, it falls under tariff item 2921.59.00.
4,4'-Diamino-3,3'-dichlorodiphenylmethane
4,4'-Diamino-3,3'-dichlorodiphenylmethane is a chlorinated aromatic polyamine derivative used as a curing agent in specialty polymers. Its amine-function groups and aromatic structure place it under tariff item 2921.59.00.
4,4'-Diamino-3,3'-dimethylbiphenyl
4,4'-Diamino-3,3'-dimethylbiphenyl, also known as o-tolidine, is a biphenyl-based aromatic polyamine used as an intermediate for high-performance polymers and dyes. Its two amine groups on a dimethylbiphenyl structure classify it under tariff item 2921.59.00.
4,4'-Diamino-3-biphenylsulfonic Acid (3-Benzidinesulfonic Acid)
4,4'-Diamino-3-biphenylsulfonic acid is a sulfonated aromatic polyamine used as a dye intermediate. It is classified under tariff item 2921.59.00 as an 'other' aromatic polyamine, as sulfonic acid groups do not exclude it from this heading.
4,4'-Diaminodiphenylmethane
4,4'-Diaminodiphenylmethane (DDM) is an aromatic polyamine used in epoxy resin curing and polyimide synthesis. Its two amine groups on a diphenylmethane structure place it under tariff item 2921.59.00 for other aromatic polyamines.
4,4'-Diaminostilbene-2,2'-disulfonic acid Powder
4,4'-Diaminostilbene-2,2'-disulfonic acid powder is the powdered form of a chemically defined aromatic polyamine derivative. It is a white to light yellow crystalline compound used as a dye precursor and in optical brighteners. As a separate chemically defined organic compound, it is classified under tariff item 2921.59.00.
4,4'-Methylene bis(2,6-Diethylaniline)
4,4'-Methylene bis(2,6-diethylaniline) is a chemically defined aromatic polyamine with a methylene bridge linking two diethyl-substituted aniline rings. It functions as an antioxidant intermediate and polymer modifier in high-performance applications. As an aromatic polyamine, it falls under tariff item 2921.59.00.
4,4'-Methylene bis(2,6-Diisopropylaniline)
4,4'-Methylene bis(2,6-diisopropylaniline) is a sterically hindered aromatic polyamine with isopropyl substituents on each aniline ring. It serves as a high-performance antioxidant stabilizer for polyolefins and synthetic lubricants. As an aromatic polyamine derivative, it is classified under tariff item 2921.59.00.
4,4'-Methylenebis(2-chloroaniline)
4,4'-Methylenebis(2-chloroaniline), known as MOCA, is a dichloro-substituted aromatic polyamine used as a curing agent in polyurethane production. It is classified under tariff item 2921.59.00 as an 'other' aromatic polyamine derivative.
4,4'-Methylene bis(3-Chloro-2,6-Diethylaniline)
4,4'-Methylene bis(3-chloro-2,6-diethylaniline) is a chlorinated aromatic polyamine with a methylene bridge and both chloro and ethyl substituents. It is used in specialty polymer antioxidants and as a flame retardant synergist. As an aromatic polyamine derivative, it falls under tariff item 2921.59.00.
4,4'-Methylenedianiline Aqueous Solution 20%
4,4'-Methylenedianiline aqueous solution 20% is a solution of the chemically defined aromatic polyamine in water. The solution is a normal and necessary method of putting up the product for transport and safety reasons. As a dissolved product of an aromatic polyamine, it is classified under tariff item 2921.59.00.
4,4'-Methylenedianiline Dihydrochloride Salt
4,4'-Methylenedianiline dihydrochloride salt is the dihydrochloride salt form of the aromatic polyamine 4,4'-methylenedianiline. The amine groups are protonated with hydrochloric acid, forming a stable salt. As a salt of an aromatic polyamine, it is classified under tariff item 2921.59.00.
4,4'-Methylenedianiline (MDA)
4,4'-Methylenedianiline (MDA) is a chemically defined aromatic polyamine with the formula C13H14N2, consisting of two aniline groups linked by a methylene bridge. It is used in epoxy resin curing and polyimide synthesis. As an aromatic polyamine, it falls under tariff item 2921.59.00.
5-Amino-2-(p-aminoanilino) Benzenesulfonic Acid
5-Amino-2-(p-aminoanilino)benzenesulfonic acid is a complex aromatic polyamine with sulfonic acid substitution, used in azo dye coupling. It is classified under tariff item 2921.59.00 as an 'other' aromatic polyamine derivative.
CAS 137-30-4 1,8-Naphthalenediamine Powder
Pure powdered 1,8-naphthalenediamine (CAS 137-30-4) is an aromatic polyamine essential for synthesizing azo dyes and rubber antioxidants. It is classified under tariff item 2921.59.00 as an 'other' aromatic polyamine derivative.
DAS (4,4'-Diamino-2,2'-stilbenedisulfonic acid) Technical Grade
Technical grade 4,4'-diamino-2,2'-stilbenedisulfonic acid (DAS) is a high-purity form of a chemically defined aromatic polyamine derivative. It is used in the production of optical brighteners and fluorescent whitening agents. As a separate chemically defined organic compound, it falls under tariff item 2921.59.00.
Ethyl-(2-dimethylaminoethyl) Aniline
Ethyl-(2-dimethylaminoethyl)aniline is a tertiary amine derivative used as a dye intermediate and photographic chemical. It is an aromatic polyamine classified under tariff item 2921.59.00 as an 'other' derivative.
High Purity 1,8-Naphthalenediamine for Dye Synthesis
High-purity 1,8-naphthalenediamine for dye synthesis is a key aromatic polyamine intermediate. It is classified under tariff item 2921.59.00 as an 'other' aromatic polyamine, meeting Chapter 29 requirements for separate chemically defined compounds.
High Purity 4,4'-Methylenedianiline Flakes
High purity 4,4'-methylenedianiline flakes are a form of the chemically defined aromatic polyamine with purity greater than 99%. The flake form is used for precise industrial dosing in isocyanate reactions. As a pure, chemically defined aromatic polyamine, it is classified under tariff item 2921.59.00.
Industrial 1,8-Diaminonaphthalene for Polymers
Industrial-grade 1,8-diaminonaphthalene serves as a curing agent in epoxy resins and polyurethanes. It is an aromatic polyamine classified under tariff item 2921.59.00 as an 'other' derivative, provided it is chemically defined.
m-Phenylenediamine
m-Phenylenediamine is an aromatic diamine used in epoxy resins, polyurethanes, and as a dye intermediate. Its two amine groups on a benzene ring classify it under tariff item 2921.59.00 for other aromatic polyamines.
m-Xylene Diamine
m-Xylene diamine, also known as 2,4-diaminotoluene, is a chemically defined aromatic polyamine with two amine groups on a toluene ring. It is widely used in epoxy resin curing agents and polyimide synthesis. As an aromatic polyamine, it is classified under tariff item 2921.59.00.
N-Ethyl-N,N'-Dimethyl-N'-Phenylethylenediamine
N-Ethyl-N,N'-dimethyl-N'-phenylethylenediamine is a complex polyamine derivative used as an antioxidant in polymers and dye intermediate. It is classified under tariff item 2921.59.00 as an 'other' aromatic polyamine.
o-Tolidine (2,2'-Dimethylbenzidine)
o-Tolidine (2,2'-dimethylbenzidine) is a dimethyl-substituted aromatic diamine used in pigment synthesis and analytical reagents. Its two amine groups on a dimethylbiphenyl structure place it under tariff item 2921.59.00.
p-Phenylenediamine
p-Phenylenediamine is an aromatic diamine used primarily as an intermediate in the production of polymers, dyes, and rubber antioxidants. Its two amine groups on a benzene ring classify it under tariff item 2921.59.00 for other aromatic polyamines.
Technical Grade 4,4'-Methylenedianiline with Stabilizer
Technical grade 4,4'-methylenedianiline with stabilizer is a chemically defined aromatic polyamine containing impurities or added stabilizers for preservation or transport. The stabilizer is necessary for preservation or transport and does not render the product suitable for specific use. As an aromatic polyamine with added stabilizer, it falls under tariff item 2921.59.00.