HFC-143a 99.99% Semiconductor Grade from Mexico
Ultra-high purity 1,1,1-trifluoroethane (HFC-143a) for semiconductor etch processes and plasma cleaning. HTS 2903.44.1020 classification applies as this pure compound is explicitly named in the fluorinated acyclic hydrocarbons subheading.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide SEMI S2/S8 safety certification and <1 ppb metals analysis via ICP-MS
• Use stainless steel cylinders with VCR fittings; include helium leak rate certification
• TSCA Section 12(b) export notification may apply for semiconductor chemicals