4,4'-Methylenedianiline
Amine-function compounds > Aromatic polyamines and their derivatives; salts thereof: > Other: > 4,4'-Methylenedianiline
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 2921.59.30.00
4,4'-Methylenedianiline (MDA)
4,4'-Methylenedianiline is a specific aromatic polyamine compound with the chemical formula C13H14N2, consisting of two aniline groups linked by a methylene bridge. It falls under HTS 2921.59.3000 as it is explicitly named in the tariff schedule within the subheading for other aromatic polyamines and their derivatives. This chemically defined organic compound is used primarily in industrial chemical synthesis.
4,4'-Methylenedianiline Dihydrochloride Salt
This is the dihydrochloride salt form of 4,4'-methylenedianiline, a derivative where the amine groups are protonated with HCl. It remains classified under HTS 2921.59.3000 as salts of aromatic polyamines are included with the parent compound per chapter note 3(C)(1). Used in specialized chemical processes requiring the salt for solubility.
Technical Grade 4,4'-Methylenedianiline with Stabilizer
Technical grade 4,4'-methylenedianiline containing impurities or added stabilizers for preservation/transport, still primarily the named compound. Classified under HTS 2921.59.3000 as chapter note (f) allows stabilizers without changing the principal classification. Intended for polyurethane precursor manufacturing.
High Purity 4,4'-Methylenedianiline Flakes
High purity (>99%) 4,4'-methylenedianiline supplied in flake form for precise industrial dosing in isocyanate reactions. Explicitly under HTS 2921.59.3000 as the pure, chemically defined aromatic polyamine matching the tariff description. Critical intermediate for MDI production.
4,4'-Methylenedianiline Aqueous Solution 20%
20% aqueous solution of 4,4'-methylenedianiline, prepared as a normal transport method per chapter note (d). Remains classified under HTS 2921.59.3000 as the dissolved chemically defined compound. Used for safer handling in formulation plants.