m-Phenylenediamine Technical Grade from China
Technical grade m-phenylenediamine is a diaminobenzene polyamine used in epoxy hardeners, though 'pure' grades may have specific codes. As an aromatic polyamine not fitting earlier subheadings, HTS 2921.59.80 applies to impure or derivative forms per Chapter 29 impurity allowances.
Duty Rate — China → United States
44%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
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)
Import Tips
• Purity <99% justifies 2921.59.80 vs purer 2921.51; provide GC assay
• Oxidation stabilizer declaration needed if contains Chapter 29 note (f) additives
• Dark color common; appearance specs prevent mixture reclassification