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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as a derivative such as a substituted analog or salt
Other aromatic polyamines and derivatives not specifically named like MDA fall into the general 'other' subheading.
If dissolved in solvents for safe transport exceeding general use suitability
Per chapter note (e), solutions in solvents for safety/transport where solvent doesn't adapt for specific use classify as chemical preparations in Chapter 38.
If in salt form classified by the acid component rather than amine
Aromatic ether-alcohol amines or certain salts may shift to Chapter 29 headings based on the parent acid or alcohol function per classification notes.
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Import Tips & Compliance
• Obtain EPA TSCA certification as MDA is a regulated substance under the Toxic Substances Control Act; provide safety data sheets (SDS)
• Ensure proper hazardous material labeling and packaging compliant with DOT and IMDG regulations for transport
• Verify importer security filing (ISF) includes chemical name, CAS number (101-77-9), and purity specifications to avoid customs delays
Related Products under HTS 2921.59.30.00
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.