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Appendix K to Subpart G of Part 82—Substitutes Subject to Use Restrictions and Unacceptable Substitutes Listed in the July 22, 2002, Final Rule Effective August 21, 2002

Substitutes Subject to Use Restrictions and Unacceptable Substitutes Listed in the July 22, 2002, Final Rule Effective August 21, 2002

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  11. Appendix Appendix K to Subpart G of Part 82
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Displayed edition2026-04-27
Last updated2026-04-27

Appendix K to Subpart G of Part 82—Substitutes Subject to Use Restrictions and Unacceptable Substitutes Listed in the July 22, 2002, Final Rule Effective August 21, 2002

Foam Blowing—Unacceptable Substitutes

End-useSubstituteDecisionComments
Replacements for HCFC-141b in the following rigid polyurethane/polyisocyanurate applications:

—Boardstock

—Appliance

—Spray		HCFC-22, HCFC-142b and blends thereofUnacceptable Closed cell foam products and products containing closed cell foams manufactured with these substitutes on or before December 1, 2017 may be used after that dateAlternatives exist with lower or zero-ODP.
All foam end-usesHCFC-124Unacceptable 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 dateAlternatives exist with lower or zero-ODP.

[81 FR 86883, Dec. 1, 2016]