2,4-Diamino-toluene (2,4-Toluenediamine)
2,4-Diaminotoluene is a diaminotoluidine used in polyurethane elastomers and hair dyes. Despite two amino groups, it retains toluidine classification under HTS 2921.43.90 as the methylaniline parent structure predominates. Purity specification critical for Chapter 29 entry.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If o-phenylenediamine derivatives
Diamines without methyl substitution classify in 2921.51; toluidine methyl defines heading.
If acyclic diamine chain
Acyclic polyamines separate from aromatic mono/diamines.
If permanent hair dye formulation
Hair dye preparations containing aromatic diamines classify as synthetic dyes.
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Import Tips & Compliance
• Specify 2,4-isomer >95%; 2,6-isomer classifies differently under 2921.51
• Include skin sensitization data; EU Annex XVII restrictions apply
• Hair dye use requires cosmetic notification; industrial use simpler clearance
Related Products under HTS 2921.43.90
p-Toluidine
p-Toluidine, also known as 4-methylaniline, is an aromatic monoamine derivative with the chemical formula C7H9N. It falls under HTS 2921.43.90 as a toluidine (methyl-substituted aniline) that is not specifically listed elsewhere in the subheading for toluidines and their salts. Commonly used in dye synthesis and as a chemical intermediate.
o-Toluidine Hydrochloride
o-Toluidine hydrochloride is the salt form of 2-methylaniline, a toluidine derivative used in pharmaceutical synthesis. Classified under HTS 2921.43.90 per Chapter Note (C)(1) as the salt retains classification of the parent aromatic monoamine. The hydrochloride improves handling and solubility for industrial applications.
m-Toluidine (3-Methylaniline)
m-Toluidine, or 3-methylaniline, is a meta-substituted toluidine used as an intermediate in agrochemical production. It qualifies under HTS 2921.43.90 as an 'other' toluidine derivative not covered by more specific subheadings. The methyl group distinguishes it from aniline (2921.42).
N-Ethyl-o-Toluidine
N-Ethyl-o-toluidine is an N-alkylated derivative of o-toluidine used in rubber accelerator production. It remains classified under HTS 2921.43.90 as a toluidine derivative; N-substitution doesn't change the principal aromatic monoamine characteristic. Purity >98% ensures Chapter 29 applicability.
4-Chloro-o-Toluidine
4-Chloro-o-toluidine is a halogenated toluidine derivative used in azo pigment synthesis. Classified in HTS 2921.43.90 as Chapter Notes confirm halogenated derivatives remain with parent amine classification. The dual substitution maintains toluidine identity.
Toluidine Blue O (Basic Blue 17)
Toluidine Blue O is a thiazine dye derived from toluidine, used in histology and microbiology staining. While primarily a colorant, its toluidine base and chemical purity qualify it under HTS 2921.43.90 rather than Chapter 32 when imported as pure compound. Pharmaceutical grade requires >85% purity.