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SNAP

SIGNIFICANT NEW ALTERNATIVES POLICY

January 13, 2022

www.epa.gov/ozone/snap

FACT SHEET

SNAP Determination of Acceptability 37 (Notice 37)

Action Listing New Acceptable Substitutes

Section 612 of the Clean Air Act requires EPA to evaluate alternatives to ozone-depleting substances. EPA's Significant
New Alternatives Policy (SNAP) program reviews
substitutes in a comparative risk framework, using the
same risk criteria for all SNAP decisions. Section 612
requires EPA to list as acceptable those substitutes that
do not present a significantly greater risk to human
health and the environment as compared with other
substitutes that are currently or potentially available.

This determination of acceptability (Notice 37) expands
EPA's SNAP list of acceptable substitutes, providing
industry with more options in the refrigeration and air
conditioning, foam blowing, aerosols, cleaning solvents,
and adheisves, coatings, and inks sectors.

SUMMARY OF ACCEPTABLE SUBSTITUTES

Notice 37

What is included in the Notice?

•	Five additional acceptable substitutes that
reduce overall risk to human health and
environment

Which industrial sectors are included?

•	Refrigeration & Air Conditioning

•	Foam Blowing

•	Aerosols

•	Cleaning Solvents

•	Adhesives, Coatings & Inks

What health and environmental impacts of

substitutes does EPA evaluate?

o Atmospheric effects, toxicity, flammability,
occupational and consumer health/safety,
local air quality, and ecosystem effects

End-Use

Substitutes

Refrigeration & Air Conditioning

Cold Storage Warehouses (New)

HCFO-1233zd(E)

Ice Skating Rinks (New)

HCFO-1233zd(E)

Industrial Process Air Conditioning (New)

HCFO-1233zd(E)

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End-Use

Substitutes

Foam Blowing

Polystyrene: Extruded Boardstock and Billet

HFO-1234ze(E)/HCFO-1233zd(E) co-blowing
blends,

HFO-1234ze(E)/HFC-152a co-blowing blends,
HFO-1234ze(E)/methylformate/HFC-152a/C02/
water co-blowing blends

Aerosols

Aerosol Solvents

HCFO-1233yd(Z)

Cleaning Solvents

Electronics Cleaning

HCFO-1233yd(Z)

Metals Cleaning

HCFO-1233yd(Z)

Precision Cleaning

HCFO-1233yd(Z)

Adhesives, Coatings, and Inks

Coatings

HCFO-1233yd(Z)

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