4,4'-Diaminodiphenylmethane (DADPM) from Canada
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 — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 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