R-421A HCFC Replacement Blend from Mexico
R-421A contains HCFC-22 with hydrocarbons as drop-in replacement for R-22 in residential AC systems. Classified HTS 3827.39.00.00 due to HCFC content despite hydrocarbon presence. Designed for existing R-22 equipment without oil change.
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
• Address hydrocarbon flammability in shipping papers; provide retrofit instructions; ensure blend stability testing documentation