4,4'-Bis(α,α-dimethylbenzyl)diphenylamine
This is a specific aromatic diphenylamine derivative used primarily as an antioxidant and stabilizer in rubber and polymer production. It falls under HTS 2921.44.0500 as it is explicitly named in the tariff heading for diphenylamine derivatives. The compound's structure features two α,α-dimethylbenzyl groups attached to the 4,4' positions of diphenylamine, providing steric hindrance for effective stabilization.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If when pre-diluted or formulated specifically as an antioxidant for rubber
Mixtures of antioxidants classified under 3812 rather than pure chemical compounds of Chapter 29.
If imported as part of a prepared chemical additive blend
Prepared chemical compositions fall under Chapter 38, not pure organic compounds.
If considered a substituted benzyl alcohol derivative
Alternative classification possible under aromatic alcohols if amine function not principal characteristic.
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Import Tips & Compliance
• Provide detailed chemical analysis certificates (COA) confirming purity and structure matching the exact tariff description to avoid misclassification
• Ensure proper Hazard Communication labeling per GHS as it's a chemical substance requiring SDS documentation for customs clearance
• Verify REACH compliance if sourcing from EU; common pitfall is incomplete impurity declarations affecting Chapter 29 eligibility
Related Products under HTS 2921.44.05.00
N-Nitrosodiphenylamine
N-Nitrosodiphenylamine is a nitroso derivative of diphenylamine explicitly listed under HTS 2921.44.0500. It serves as an intermediate in organic synthesis and as a reagent in analytical chemistry. The nitroso group (-NO) attached to the nitrogen distinguishes it within the diphenylamine derivatives category of Chapter 29.
Naugard XL-1 Antioxidant (4,4'-Bis(α,α-dimethylbenzyl)diphenylamine)
Commercial grade 4,4'-Bis(α,α-dimethylbenzyl)diphenylamine sold under the trademark Naugard XL-1 for tire and rubber compounding. Classified under HTS 2921.44.0500 as the pure named chemical compound per Chapter 29 notes. Used to prevent oxidative degradation in natural and synthetic rubber products.
Vulkanox ZMF Rubber Stabilizer
Vulkanox ZMF is the trade name for high-purity 4,4'-Bis(α,α-dimethylbenzyl)diphenylamine used in automotive tire manufacturing. Falls squarely under HTS 2921.44.0500 as a specifically named diphenylamine derivative. Provides long-term heat aging resistance in rubber vulcanizates.
N-Nitrosodiphenylamine Analytical Standard
High-purity N-Nitrosodiphenylamine (99.5%+) certified reference material for EPA Method 8270 laboratory analysis. Classified under HTS 2921.44.0500 as the pure named chemical meeting Chapter 29 purity requirements. Used for calibration of GC-MS instruments detecting nitrosamines in environmental samples.