4,4'-Diaminodiphenylmethane (DADPM) from China
4,4'-Diaminodiphenylmethane (DADPM), also known as MDA, is a key aromatic polyamine used in epoxy resin curing and polyurethane production. Classified under HTS 2921.59.80 as an 'other' derivative of aromatic polyamines, it features two aniline rings linked by a methylene group, fitting Chapter 29's amine-function compounds not covered by prior subheadings.
Duty Rate — China → United States
31.5%
Rate breakdown
9903.88.0325%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)
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Submit detailed structural formula and IUPAC name in entry docs to distinguish from toluidine derivatives in 2921.51
• Comply with REACH/TSCA pre-registration for this high-concern substance; include hazard classifications
• Watch for anti-dumping duties if sourced from specific countries; check Commerce Department notices