o-Phenylenediamine (1,2-Diaminobenzene)
Pure o-phenylenediamine serves as an intermediate for benzimidazoles, dyes, and fungicides. Classified in HTS 2921.51.30.00 because it matches the products enumerated in additional U.S. note 3 to section VI.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not covered by U.S. note 3 listing
General 'other' category for phenylenediamines.
If when containing heterocyclic impurities from synthesis
Heterocyclic compounds take precedence per chapter notes.
If technical grade with >5% impurities
Prepared binders with chemical character classify as mixtures.
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Import Tips & Compliance
• Provide NMR spectra confirming structure per note 3 requirements
• Package to prevent oxidation; stabilizers must comply with note 1(f)
• Declare exact assay percentage to avoid mixture classification
Related Products under HTS 2921.51.30.00
o-Phenylenediamine Dihydrochloride
o-Phenylenediamine dihydrochloride is the salt form of o-phenylenediamine, a key aromatic polyamine used in dye and pharmaceutical synthesis. It falls under HTS 2921.51.30.00 as a derivative salt of o-phenylenediamine described in additional U.S. note 3 to section VI, which covers specific listed organic compounds.
p-Phenylenediamine Sulfate
p-Phenylenediamine sulfate is a salt derivative used primarily in oxidative hair dyes and rubber antioxidants. Classified under HTS 2921.51.30.00 as it matches products in additional U.S. note 3, specifically salts of p-phenylenediamine.
4,4'-Diaminodiphenylmethane (DADPM)
DADPM, or methylene bis(o-chloroaniline) derivative, is an aromatic polyamine used in polyurethane curing agents. It qualifies under HTS 2921.51.30.00 per additional U.S. note 3 for listed diaminotoluene derivatives and salts.
2,4-Diaminotoluene (2,4-Toluenediamine)
2,4-Toluenediamine is a diaminotoluene isomer used in dyes, polymers, and as a chain extender. Falls under HTS 2921.51.30.00 as described in additional U.S. note 3 to section VI for these specific aromatic polyamines.
p-Phenylenediamine (1,4-Diaminobenzene)
p-Phenylenediamine is widely used in permanent hair colorants and as an antioxidant. It is included under HTS 2921.51.30.00 per the specific listing in additional U.S. note 3.
2,6-Diaminotoluene
2,6-Diaminotoluene functions as a dye intermediate and polymer modifier. Covered by HTS 2921.51.30.00 as a diaminotoluene derivative described in U.S. note 3.