Chlorodifluoroethane HCFC-142b for Foam Blowing from Mexico
HCFC-142b in 100 lb recovery cylinders for use as auxiliary foam blowing agent in polystyrene and polyurethane insulation. Falls under HTS 2903.74.01.00 as a pure halogenated derivative of acyclic ethane per Chapter 29 note (a). Not classifiable as Chapter 39 plastic additive.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Document end-use as foam blowing to qualify for any available essential-use exemptions
• Avoid shipping during extreme heat; pressure relief valves must be rated for 142b vapor pressure
• Include GWP (Global Warming Potential) data in documentation for customs review