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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as the free base without salt formation
The pure o-phenylenediamine base is classified separately from its salts in the prior subheading.
If it's a derivative like acetylated form rather than the base or simple salt
Other derivatives of phenylenediamines fall under the 'other' derivative category.
If imported as a mixture with solvents or stabilizers exceeding chapter note limits
Solutions or preparations not qualifying as pure compounds per chapter notes go to mixtures heading.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Verify the product matches exactly the chemical description in additional U.S. note 3 to section VI for proper classification
• Provide detailed chemical analysis certificates (CAS number 615-28-1) and purity specs to avoid reclassification
• Ensure SDS and transport docs note it's a hazardous substance under DOT regulations
Related Products under HTS 2921.51.30.00
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.
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.
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.