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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 2921.5
1,4-Diaminobenzene (p-Phenylenediamine Base)
>- 1,4-Diaminobenzene (p-phenylenediamine base) is used in photographic chemicals and dyes. It is specifically named in tariff item 2921.51.00, which covers p-phenylenediamine and its derivatives and salts.
2921.51.002,4-Diaminotoluene (2,4-TDA)
>- 2,4-Diaminotoluene (2,4-TDA) is a diaminotoluene isomer used in polyurethane elastomers, dyes, and hair colorants. It is specifically named in tariff item 2921.51.00, which covers diaminotoluenes and their derivatives and salts.
2921.51.002,4-Diaminotoluene (2,4-Toluenediamine)
>- 2,4-Diaminotoluene (2,4-toluenediamine) is a diaminotoluene isomer used in dyes, polymers, and as a chain extender. It is specifically named in tariff item 2921.51.00, which covers diaminotoluenes and their derivatives and salts.
2921.51.002,4-Diaminotoluene Sulfate
2,4-Diaminotoluene sulfate is a salt of diaminotoluene, an aromatic polyamine, used as an intermediate and stabilizer in photographic chemical formulations, particularly for dye developers. As a chemically defined organic compound with an added sulfate group, it falls under tariff item 2921.51.00, which covers o-, m-, p-phenylenediamine, diaminotoluenes, and their derivatives and salts.
2921.51.002,5-Diaminotoluene Sulfate
>- 2,5-Diaminotoluene sulfate is a salt used primarily in permanent hair coloring formulations. Under Chapter 29 note 5(C)(1), salts of organic compounds are classified with the parent compound, so this salt of a diaminotoluene falls under tariff item 2921.51.00.
2921.51.002,6-Diaminotoluene
>- 2,6-Diaminotoluene is a diaminotoluene isomer used as a dye intermediate and polymer modifier. It is a diaminotoluene derivative explicitly named in tariff item 2921.51.00, which covers diaminotoluenes and their derivatives and salts.
2921.51.004,4'-Diaminodiphenylmethane (DADPM)
4,4'-Diaminodiphenylmethane (DADPM) is an aromatic polyamine used in polyurethane curing agents. Although it is not a phenylenediamine or diaminotoluene, it is a derivative of these compounds, and it falls under 2921.51.00 as an 'other' aromatic polyamine derivative.
2921.51.004-Amino-2-(N,N-Diethylamino)Toluene Hydrochloride
>- 4-Amino-2-(N,N-diethylamino)toluene hydrochloride is a substituted diaminotoluene salt used as a specialty dye intermediate for reactive dyes. As a salt of a diaminotoluene derivative, it falls under tariff item 2921.51.00, which covers o-, m-, p-phenylenediamine, diaminotoluenes, and their derivatives and salts.
2921.51.004-Amino-N-ethylaniline Sulfate
4-Amino-N-ethylaniline sulfate is a salt of a p-phenylenediamine derivative, functioning as a photographic dye-forming developer in color negative processing. It is a chemically defined organic compound, and its classification under 2921.51.00 is justified as a derivative of p-phenylenediamine with a sulfate salt.
2921.51.004-Amino-N-phenylaniline (PAD)
4-Amino-N-phenylaniline (PAD) is a derivative of p-phenylenediamine used in dye manufacturing and polymer production. It is a chemically defined organic compound, and it falls under 2921.51.00 as an 'other' aromatic polyamine derivative.
2921.51.004-Nitro-o-phenylenediamine
4-Nitro-o-phenylenediamine is a derivative of o-phenylenediamine, used as an intermediate in the production of photographic developers and dyes. It contains a nitro group, which is not considered a nitrogen function for classification purposes, so it remains within the scope of 2921.51.00 as a derivative of phenylenediamine.
2921.51.00CD-2 Developing Agent (p-Phenylenediamine Derivative)
CD-2 Developing Agent is a commercial p-phenylenediamine derivative used as a color developer in photographic processing solutions. It is a chemically defined organic compound, and its classification under 2921.51.00 is based on its identity as a p-phenylenediamine derivative.
2921.51.00m-Phenylenediamine
>- m-Phenylenediamine (1,3-diaminobenzene) is an aromatic diamine used as a building block for isocyanates, epoxy resins, and hair dyes. It is explicitly named in tariff item 2921.51.00, which covers m-phenylenediamine and its derivatives and salts.
2921.51.00m-Phenylenediamine (m-PDA)
m-Phenylenediamine (m-PDA) is an aromatic meta-diamine used in epoxy resin hardeners and polyimide films. It is a separate chemically defined compound, and it falls under 2921.51.00 as m-phenylenediamine.
2921.51.00N-(2-Aminoethyl)-p-phenylenediamine
N-(2-Aminoethyl)-p-phenylenediamine is a substituted p-phenylenediamine derivative used in color photographic coupler synthesis. It is a chemically defined organic compound with an additional aminoethyl group, and it falls under 2921.51.00 as a derivative of p-phenylenediamine.
2921.51.00N,N-Diethyl-p-phenylenediamine Sulfate
N,N-Diethyl-p-phenylenediamine sulfate is a p-phenylenediamine derivative serving as a color developing agent in color photographic processing. It is a salt of a substituted phenylenediamine, and its classification under 2921.51.00 is based on its identity as a derivative of p-phenylenediamine.
2921.51.00N,N'-Diphenyl-p-phenylenediamine (DPPD)
N,N'-Diphenyl-p-phenylenediamine (DPPD) is a substituted p-phenylenediamine derivative serving as an antiozonant in tire rubber compounds. It is a chemically defined organic compound, and it falls under 2921.51.00 as an 'other' aromatic polyamine derivative.
2921.51.00o-Phenylenediamine
>- o-Phenylenediamine (1,2-diaminobenzene) is an aromatic diamine used as an intermediate in the synthesis of dyes, pharmaceuticals, and agrochemicals. It is specifically named in tariff item 2921.51.00, which covers o-phenylenediamine and its derivatives and salts.
2921.51.00o-Phenylenediamine (1,2-Diaminobenzene)
o-Phenylenediamine (1,2-diaminobenzene) is a pure aromatic diamine used as an intermediate for benzimidazoles, dyes, and fungicides. It is a separate chemically defined compound, and it falls under 2921.51.00 as o-phenylenediamine.
2921.51.00o-Phenylenediamine Dihydrochloride
>- o-Phenylenediamine dihydrochloride is the dihydrochloride salt of o-phenylenediamine, used in pharmaceutical synthesis and as an analytical reagent. Under Chapter 29 note 5(C)(1), inorganic salts of organic compounds are classified with the parent organic compound, so this salt falls under tariff item 2921.51.00.
2921.51.00p-Aminodimethylaniline Hydrochloride
p-Aminodimethylaniline hydrochloride, a derivative of p-phenylenediamine, functions as a photographic developing agent in black-and-white film processing. It is a hydrochloride salt of a substituted phenylenediamine, and it falls under 2921.51.00 as a derivative of p-phenylenediamine.
2921.51.00p-Aminodiphenylamine
p-Aminodiphenylamine serves as an intermediate for rubber antioxidants and dyes. As a derivative of p-phenylenediamine, it is a chemically defined organic compound, and it falls under 2921.51.00 as an 'other' aromatic polyamine derivative.
2921.51.00p-Phenylenediamine (1,4-Diaminobenzene)
>- p-Phenylenediamine (1,4-diaminobenzene) is widely used in permanent hair colorants and as an antioxidant. It is specifically named in tariff item 2921.51.00, which covers p-phenylenediamine and its derivatives and salts.
2921.51.00p-Phenylenediamine Dihydrochloride
p-Phenylenediamine dihydrochloride acts as a primary developing agent in photographic film processing and is a key aromatic polyamine salt. It is the dihydrochloride salt of p-phenylenediamine, and its classification under 2921.51.00 is based on its identity as a salt of p-phenylenediamine.
2921.51.00p-Phenylenediamine Sulfate
>- p-Phenylenediamine sulfate is a salt derivative of p-phenylenediamine used primarily in oxidative hair dyes and rubber antioxidants. Under Chapter 29 note 5(C)(1), salts of organic compounds are classified with the parent compound, so this salt falls under tariff item 2921.51.00.
2921.51.00Technical Grade Toluene-2,4-Diamine (98% purity)
>- Technical grade toluene-2,4-diamine at 98% purity is used in TDI manufacturing. Although it contains minor isomers, the principal compound is toluene-2,4-diamine, which is specifically named in tariff item 2921.51.00. Chapter note 1(b) allows mixtures of isomers of the same organic compound to be classified in this chapter.
2921.51.00Toluene-2,4-Diamine
>- Toluene-2,4-diamine (2,4-TDA) is a diaminotoluene isomer essential for polyurethane production and toluene diisocyanate (TDI) synthesis. It is specifically named in tariff item 2921.51.00, which covers diaminotoluenes and their derivatives and salts.
2921.51.00Toluene-2,5-Diamine
>- Toluene-2,5-diamine is used in permanent hair dyes and as a photographic chemical intermediate. It is a diaminotoluene isomer explicitly named in tariff item 2921.51.00, which covers diaminotoluenes and their derivatives and salts.
2921.51.00Toluene-2,5-Diamine Sulfate
>- Toluene-2,5-diamine sulfate is the sulfate salt of toluene-2,5-diamine, used primarily in oxidative hair colorants for its stability. Under Chapter 29 note 5(C)(1), salts of organic compounds are classified with the parent compound, so this salt falls under tariff item 2921.51.00.
2921.51.00Toluenediamine Photographic Grade
Toluenediamine photographic grade consists of high-purity diaminotoluene isomers optimized for photographic chemical manufacturing. As a mixture of isomers of the same organic compound, it falls under 2921.51.00, which covers diaminotoluenes and their derivatives.
2921.59.001,4-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.
2921.59.001,8-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.
2921.59.001,8-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.
2921.59.001,8-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.
2921.59.001,8-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.
2921.59.002,2'-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.
2921.59.002,4,6-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.
2921.59.002,4-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.
2921.59.003,3'-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.
2921.59.003,3'-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.
2921.59.003,3'-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.
2921.59.003,3'-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.
2921.59.003,3'-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.
2921.59.004,4'-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.
2921.59.004,4'-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.
2921.59.004,4'-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.
2921.59.004,4'-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.
2921.59.004,4'-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.
2921.59.004,4'-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.
2921.59.004,4'-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.
2921.59.004,4'-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.
2921.59.004,4'-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.
2921.59.004,4'-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.
2921.59.004,4'-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.
2921.59.004,4'-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.
2921.59.004,4'-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.
2921.59.004,4'-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.
2921.59.005-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.
2921.59.00CAS 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.
2921.59.00DAS (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.