4,4'-Diaminodiphenylmethane (DADPM) from Canada
DADPM, or methylene bis(o-chloroaniline) derivative, is an aromatic polyamine used in polyurethane curing agents. It qualifies under HTS 2921.51.30.00 per additional U.S. note 3 for listed diaminotoluene derivatives and salts.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Submit structural formula and synthesis route to confirm note 3 listing
• Handle as potential carcinogen; ensure proper hazmat shipping declarations
• Test for isomer purity to prevent shift to general polyamine headings