HFC-32 Difluoromethane with Stabilizer Inhibitor from Canada
Difluoromethane containing minimal polymerization inhibitor stabilizer as permitted by Chapter 29 note (f) for preservation during transport. Remains classified as pure HFC-32 under 2903.42.10.00 since addition necessary solely for safety. Used in new R-32 heat pump systems.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Disclose stabilizer composition in SDS; Chapter 29 note (f) limits to necessary preservation amounts
• Classify as UN3252 (2.2+8); A2L flammability requires special ventilation labeling
• Test for stabilizer levels; excessive amounts trigger reclassification as preparation