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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the salt formation uses an organic acid instead of inorganic HCl
Salts with organic acids classify with the organic component last in numerical order per note 3(C)(2).
If for industrial quantities prepared with stabilizers exceeding chapter scope
Certain stabilized inorganic salts or preparations may fall under hydrogen peroxide/salt headings if not purely organic amine salts.
If containing heteroatoms like sulfur directly linked to carbon
Organo-sulfur heterocyclic compounds shift to heading 2933 if sulfur-carbon bonds define the structure per note exclusions.
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Import Tips & Compliance
• Include certificate of analysis (COA) confirming salt purity and absence of free base impurities during customs clearance
• Comply with OSHA carcinogen labeling requirements; MDA salts are handled similarly to the base compound
• Avoid misdeclaration as a general chemical mixture to prevent reclassification and penalties
Related Products 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.
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.