Buffered Hydrofluoric Acid (BHF) from Canada
Buffered HF solution typically 6:1 HF:NH4F for silicon dioxide etching in microelectronics. Primarily hydrogen fluoride, thus HTS 2811.11.00.00 per Chapter 28 inorganic acids note, despite buffering. Imported for precision semiconductor processing.
Duty Rate — Canada → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Declare exact buffer composition; obtain ITAR exemption if dual-use
• Avoid mislabeling as it risks reclassification to preparations