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SNAP identifier

Recent Additions

EPA publishes proposal to prohibit certain high-GWP HFCs as alternatives under SNAP (8/6/14)

EPA proposes to approve climate-friendly refrigerant alternatives under SNAP (7/9/2014)

EPA Warns Against Use of Refrigerant Substitutes that Pose Fire and Explosion Risk (7/1/2013)

Safety warning about R-22a flammable refrigerant (6/7/2013)

EPA Releases Acceptability Determination 28 approving ODS substitutes for the refrigeration and air conditioning; foam blowing; solvent cleaning; adhesives, coatings and inks; and fire suppression sectors (8 pp, 283 KB)

Key Documents

SNAP Final Rule Summary

Submit a Substitute

Lists of Substitutes

Transitioning to Low GWP Alternatives

Commercial refrigeration 

Domestic refrigeration 

Transport refrigeration 

Motor vehicle AC

Unitary (central) AC

Foam blowing agents

Non-Medical Aerosols  

GWPs in IPCC 4th Assessment Report 

The Significant New Alternatives Policy (SNAP) Program is EPA's program to evaluate and regulate substitutes for the ozone-depleting chemicals that are being phased out under the stratospheric ozone protection provisions of the Clean Air Act (CAA).

In Section 612(c) of the Clean Air Act, the Agency is authorized to identify and publish lists of acceptable and unacceptable substitutes for class I or class II ozone-depleting substances.

The Administrator has determined a large number of alternatives exist that reduce overall risk to human health and the environment. The purpose of the program is to allow a safe, smooth transition away from ozone-depleting compounds by identifying substitutes that offer lower overall risks to human health and the environment.

The SNAP program has reviewed substitutes for the following industrial sectors:

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