HFC-32 Difluoromethane with Stabilizer Inhibitor from China
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 — China → United States
13.7%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 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