N,N'-Diphenyl-p-phenylenediamine (DPPD)
N,N'-Diphenyl-p-phenylenediamine functions as an antiozonant in tire rubber compounds. Classified under HTS 2921.59.80.90 as aromatic polyamine derivative with N-substitution. Secondary amine functionality provides oxidation resistance.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If formulated as rubber antiozonant preparation
Additives prepared specifically for rubber classify in Chapter 38.
If single aromatic amine substitution
Mono-substituted aromatic amines classify under earlier subheading.
If lubricant additive formulation
Surface active preparations exceed pure compound criteria.
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Import Tips & Compliance
• Tire industry specifications require >96% assay confirmation
• Melting point range documentation verifies isomer identity
• Prevent aggregation by specifying non-dusted transport conditions
Related Products under HTS 2921.59.80.90
Tolylenediamine (2,4-Diaminotoluene)
Tolylenediamine is an aromatic polyamine used primarily as an intermediate in polyurethane production and as a curing agent for epoxy resins. It falls under HTS 2921.59.80.90 as an aromatic polyamine derivative not specifically enumerated elsewhere in the subheading. This chemically defined compound meets Chapter 29 note (a) for separate organic compounds.
4,4'-Methylenedianiline (MDA)
4,4'-Methylenedianiline is a reactive aromatic diamine used in the production of high-performance polymers and as a curing agent. Classified under HTS 2921.59.80.90 as 'other' aromatic polyamines and derivatives. Its structure contains two aromatic amine groups connected by methylene bridge.
m-Phenylenediamine (1,3-Diaminobenzene)
m-Phenylenediamine is an aromatic diamine used in epoxy resin curing, polyimide production, and as a dye intermediate. It qualifies under HTS 2921.59.80.90 as an 'other' aromatic polyamine meeting Chapter 29 purity requirements. The meta-positioned amino groups define its polyamine classification.
Benzidine Dihydrochloride
Benzidine dihydrochloride is the salt form of the aromatic tetraamine benzidine, used historically in dye manufacturing. It falls under HTS 2921.59.80.90 per Chapter 29 note on organic salts classifying with parent amine. The hydrochloride salt maintains aromatic polyamine identity.
4,4'-Diaminodiphenyl Ether (ODA)
4,4'-Diaminodiphenyl ether (oxydianiline, ODA) is an aromatic diamine used in high-performance polyimide and polyetherimide production. Classified under HTS 2921.59.80.90 as other aromatic polyamine derivative. The ether linkage between aromatic rings maintains polyamine classification.
p-Phenylenediamine Sulfate
p-Phenylenediamine sulfate is the salt form used in oxidative hair dyes and rubber accelerator production. HTS 2921.59.80.90 classification follows Chapter 29 salt rule placing it with parent aromatic polyamine. Para positioning provides specific reactivity profile.