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Substitutes in Flexible Polyurethane

Substitutes are reviewed on the basis of ozone depletion potential, global warming potential, toxicity, flammability, and exposure potential. Lists of acceptable and unacceptable substitutes are updated several times each year. A chronological list of SNAP updates is also available.

Note: SNAP Notices and Final Rules published in the Federal Register take precedence over all information on the web site.

Acceptable Substitutes
Substitute (and blends including that substitute) ODS Being Replaced
HFC-134a CFC-11, HCFCs
Methylene Chloride CFC-11
AB Technology CFC-11
HFC-152a CFC-11, HCFCs
Acetone CFC-11; HCFC-22, HCFC-142b, and blends thereof
Saturated Light Hydrocarbons (C3-C6) CFC-11, HCFC-141b; HCFC-22, HCFC-142b, and blends thereof
Electroset Technology CFC-11; HCFC-22, HCFC-142b, and blends thereof
HFC-245fa CFC-11, HCFC-141b; HCFC-22, HCFC-142b
Exxsol Blowing Agents HCFC-141b; HCFC-22, HCFC-142b, and blends thereof
Carbon Dioxide CFC-11, HCFC-22, HCFC-142b
Ecomate™ CFC-11, HCFCs
HFC-365mfc HCFC-141b; HCFC-22, HCFC-142b, and blends thereof
Water HCFCs

Substitutes that are Acceptable with Use Conditions
None at this time.

Substitutes that are Acceptable with Narrowed Use Restrictions
None at this time.

Unacceptable Substitutes
Substitute ODS Being Replaced Further Information
HCFC-124 All Alternatives exist with lower or zero-ODP.
HCFC-141b All Alternatives exist with lower or zero-ODP. Exemptions exist for (1) the use of HCFC-141b for space vehicle, nuclear and defense foam applications, (2) the use of HCFC-141b for laboratory research and development applications for foreign customers and (3) the use of fully formulated HCFC-141b foam systems in inventory before January 1, 2005, until July 1, 2005. See the September 30, 2004, final rule, 69 FR 58269, for further information.
HCFC-22, HCFC-142b, or blends thereof CFCs Alternatives exist with lower or zero-ODP.

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