TDI Diazo Ester Intermediate from Canada
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 — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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