Toluene-2,4-Diamine
Toluene-2,4-diamine (2,4-TDA) is a diaminotoluene isomer essential for polyurethane production and toluene diisocyanate (TDI) synthesis. It qualifies for HTS 2921.51.10.00 as a specifically listed toluene-2,4-diamine, an aromatic polyamine derivative.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If monofunctional aromatic amine rather than polyamine
Chapter notes require two or more amino groups for polyamine classification.
If crude technical grade with >50% purity
Less pure aromatic amines may classify as toluene derivatives in heading 2902.
If technical grade mixtures with isomers
Isomer mixtures not meeting specific compound criteria classify as preparations.
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Import Tips & Compliance
• Submit end-use statements for TDI production to support chemical classification
• Monitor for carcinogenic impurity limits (e.g
• 4,4'-MDA) per FDA/EPA regulations
• Use UN-approved packaging for toxic liquid amine hydrochloride forms
Related Products under HTS 2921.51.10.00
o-Phenylenediamine
o-Phenylenediamine is an aromatic diamine (C6H4(NH2)2) used primarily as an intermediate in the synthesis of dyes, pharmaceuticals, and agrochemicals. It falls under HTS 2921.51.10.00 as a specifically named o-phenylenediamine, which is an aromatic polyamine listed in the subheading for o-, m-, p-phenylenediamines and diaminotoluenes.
m-Phenylenediamine
m-Phenylenediamine, also known as 1,3-diaminobenzene, serves as a key building block for isocyanates, epoxy resins, and hair dyes. Classified under HTS 2921.51.10.00 as one of the specifically enumerated m-phenylenediamines, which are aromatic polyamines and their derivatives.
Toluene-2,5-Diamine
Toluene-2,5-diamine is used in permanent hair dyes and as a photographic chemical intermediate. It is explicitly named in HTS 2921.51.10.00 under diaminotoluenes, fitting the aromatic polyamine definition of the subheading.
Toluene-2,5-Diamine Sulfate
Toluene-2,5-diamine sulfate is the salt form used primarily in oxidative hair colorants for its stability. HTS 2921.51.10.00 specifically includes this salt as a derivative of the named diaminotoluene under aromatic polyamine salts.
4-Amino-2-(N,N-Diethylamino)Toluene Hydrochloride
This substituted diaminotoluene hydrochloride is a specialty dye intermediate for reactive dyes. It is precisely named in HTS 2921.51.10.00 as an aromatic polyamine derivative salt within the diaminotoluene category.
o-Phenylenediamine Dihydrochloride
The dihydrochloride salt of o-phenylenediamine used in pharmaceutical synthesis and analytical reagents. Although base form is named, chapter notes place salts with the parent aromatic polyamine in HTS 2921.51.10.00.