![[logo] US EPA](http://www.epa.gov/epafiles/images/logo_epaseal.gif){kind=logo}
Substitutes in Rigid Polyurethane, Appliance
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 infor mation on the web site.
Acceptable Substitutes
| Substitute (and blends including that substitute) | ODS Being Replaced |
|---|---|
| HCFC-123 | CFC-11 |
| HFC-134a | CFC-11, HCFCs |
| HFC-152a | CFC-11, HCFCs |
| HFC-245fa | CFC-11, HCFCs |
| HCFC-141b/HCFC-123 Blends | CFC-11 |
| Formic Acid | CFC-11, HCFCs |
| Saturated Light Hydrocarbons (C3-C6) | CFC-11, HCFCs |
| Electroset Technology | CFC-11; HCFC-22, HCFC-142b, and blends thereof |
| Carbon Dioxide | CFC-11, HCFCs |
| Vacuum Panels | CFC-11, HCFCs |
| Water | HCFCs |
| Exxsol Blowing Agents | HCFCs |
| Methyl Formate | CFC-11, HCFCs |
| Ecomate | CFCs, HCFCs |
| Transcend™ Technologies as an additive to SNAP-approved blowing agents in blends making up to 5% by weight of the total foam formulation | CFCs, HCFCs |
| HFO-1234ze | CFCs, HCFCs |
| HFC-365mfc | HCFC-141b; HCFC-22, HCFC-142b, and blends thereof |
| Formacel® TI | HCFC-22, HCFC-142b |
Substitutes that are Acceptable with Use Conditions
None at this time
for either CFC-11 or HCFCs. |
Substitutes that are Acceptable with Narrowed Use Restrictions
None at this time
for either CFC-11 or HCFCs. |
Unacceptable Substitutes
| Substitute | ODS Being Replaced | Further Information |
|---|---|---|
| HCFC-124 | All | Alternatives exist with lower or zero-ODP. |
| HCFC-22, HCFC142b or blends thereof | CFCs, HCFC-141b | 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) allowing 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. |