40 CFR Part 82, Appendix M
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| End-use | Substitute | Decision | Comments |
|---|---|---|---|
| All foam end-uses:—rigid polyurethane and polyisocyanurate laminated boardstock—rigid polyurethane appliance—rigid polyurethane spray and commercial refrigeration, and sandwich panels | HCFC-141b | Unacceptable Closed cell foam products and products containing closed cell foams manufactured with this substitute on or before December 1, 2017 may be used after that date | Alternatives exist with lower or zero-ODP. |
| —rigid polyurethane slabstock and other foams—polystyrene extruded insulation boardstock and billet—phenolic insulation board and bunstock—flexible polyurethane—polystyrene extruded sheet—Except for: 1—space vehicle—nuclear—defense—research and development for foreign customers |
1 Exemptions for specific applications are identified in the list of acceptable substitutes, which is available on the SNAP Web site at: https://www.epa.gov/snap/foam-blowing-agents.
[81 FR 86883, Dec. 1, 2016]