4,4'-Bis (α,α-dimethylbenzyl) diphenylamine; andN-Nitrosodiphenylamine
Amine-function compounds > Aromatic monoamines and their derivatives; salts thereof: > Diphenylamine and its derivatives; salts thereof: > 4,4'-Bis (α,α-dimethylbenzyl) diphenylamine; andN-Nitrosodiphenylamine
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 2921.44.05.00
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.
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.