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4,4'-Diaminodiphenylmethane from Mexico

4,4'-Diaminodiphenylmethane, also known as DDM, is an aromatic polyamine used in epoxy resin curing and polyimide synthesis. It is covered by HTS 2921.59.4000 as a derivative specified in additional U.S. note 3 to section VI.

Duty Rate — Mexico → United States

16.5%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico

Import Tips

Require manufacturer's declaration confirming purity >98% to meet 'separate chemically defined compound' criteria

Check for anti-dumping duties on certain Asian suppliers of this chemical

Document end-use as industrial intermediate to avoid consumer product misclassification