N,N'-Diphenyl-p-phenylenediamine (DPPD)
DPPD is a substituted p-phenylenediamine derivative serving as an antiozonant in tire rubber compounds. It falls under HTS 2921.51.5000 as an 'other' aromatic polyamine derivative, being chemically defined per Chapter 29 criteria.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If put up for retail rubber accelerator use
Prepared rubber accelerators exclude from Chapter 29.
If other aromatic polyamine not phenylenediamine-based
Different polyamine families in later 'other' subheading.
If 30-70% concentration in solvent
Solvent mixtures for safety exceeding note (e) limits classify as preparations.
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Import Tips & Compliance
• Industrial bulk packaging preserves chemical classification; retail shifts to 3812/3824
• Confirm no polymer pre-mixing; pure chemical only for this heading
• DOT 6.1 PG III labeling; UN 2671 for aromatic amines
Related Products under HTS 2921.51.50.00
o-Phenylenediamine
o-Phenylenediamine is a chemically defined aromatic polyamine with the formula C6H4(NH2)2, used primarily as an intermediate in the production of dyes, pigments, and pharmaceuticals. It falls under HTS 2921.51.5000 as an 'other' derivative of o-phenylenediamine, meeting Chapter 29's requirement for separate chemically defined organic compounds with amine functions.
p-Phenylenediamine Sulfate
p-Phenylenediamine sulfate is the salt of p-phenylenediamine, a key ingredient in oxidative hair dyes and rubber antioxidants. Classified under HTS 2921.51.5000 as an 'other' salt of phenylenediamine derivatives, per Chapter 29 note on classifying organic salts with the parent amine.
4-Amino-N-phenylaniline (PAD)
4-Amino-N-phenylaniline, also known as PAD, is a derivative of p-phenylenediamine used in dye manufacturing and polymer production. It qualifies under HTS 2921.51.5000 as an 'other' aromatic polyamine derivative, being a chemically defined compound in this heading.
2,4-Diaminotoluene (2,4-TDA)
2,4-Diaminotoluene is a diaminotoluene isomer used in polyurethane elastomers, dyes, and hair colorants. It is classified in HTS 2921.51.5000 as an 'other' derivative of diaminotoluenes, fitting Chapter 29's scope for aromatic amine-function compounds.
p-Phenylenediamine Dihydrochloride
p-Phenylenediamine dihydrochloride is a water-soluble salt form used in analytical chemistry and dye synthesis. Under HTS 2921.51.5000 as an 'other' salt thereof, per Chapter 29 classification rules for organic salts following the parent amine heading.
2,5-Diaminotoluene Sulfate
2,5-Diaminotoluene sulfate is a salt used primarily in permanent hair coloring formulations. Classified in HTS 2921.51.5000 as an 'other' derivative salt of diaminotoluenes, compliant with Chapter 29 salt classification provisions.