2933.79.15.00/Phthalimide/China

Phthalimide from China

Phthalimide is an aromatic heterocyclic lactam compound derived from phthalic anhydride, featuring a five-membered ring with a nitrogen hetero-atom fused to a benzene ring. It falls under HTS 2933.79.1500 as an aromatic lactam used primarily as a chemical intermediate in organic synthesis, such as for the Gabriel synthesis of primary amines. This classification aligns with Chapter 29 notes for separate chemically defined organic compounds with nitrogen hetero-atoms.

Duty Rate — China → United States

44%

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)

9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China

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Import Tips

• Verify purity certificates to confirm it meets 'chemically defined' criteria under Chapter 29; ensure SDS includes handling as a potential irritant

• Common pitfall: misclassification as a simple amide under 2924 if not emphasizing lactam structure

• Label containers clearly for transport stabilizers if added per note (f)