TDI Diazo Ester Intermediate from China
1-Naphthalenesulfonic acid, 3-diazo-3,4-dihydro-4-oxo-ar'-(1-methylethyl)[1,1'-biphenyl]-4-yl ester used as synthesis intermediate for advanced photoresists in semiconductor production. Enumerated specifically in HTS 2927.00.18.00 diazo compounds subheading.
Duty Rate — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 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
• Semiconductor industry imports require NIST-traceable purity certificates (>99.5% typically)
• ITAR/EAR export controls may apply to downstream semiconductor uses; verify end-use statements
• Avoid bulk mixture classification—separate pure compounds maintain Chapter 29 status