1

Tables of Alternatives for End-Uses Considered in the Final Rule, 

Protection of Stratospheric Ozone: Change of Listing Status for Certain 

Substitutes Under the Significant New Alternatives Policy Program

July 2015

U.S. Environmental Protection Agency

Stratospheric Protection Division

Office of Atmospheric Programs

Office of Air and Radiation
2

1 Substitutes for Newly-Manufactured Light-Duty Motor Vehicle Air Conditioning

Systems

The references to environmental and health properties of acceptable substitutes, substitutes acceptable to use conditions, and substitutes 

whose status will change under the final rule are summarized in the table below. (Substitutes previously listed as unacceptable are not included 

here.)

Table 1. Environmental and Health Properties of Refrigerants in Motor Vehicle Air Conditioning

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability 

Determination for the ODP, GWP, VOC status, flammability rating, and 

exposure limit for each listed substitute.

Carbon Dioxide

R-744;

CO2; 

CAS # 124-38-9

Refer to SNAP Rule 14.

Evaporative 

Cooling N/A Refer to SNAP Final Rule.

Freeze 12 HCFC-142b/HFC-134a;

(20/80)

Refer to SNAP Notice 5 and SNAP Notice 25.

FRIGC FR-12

R-416A; 

HCFC Blend Beta; 

HCFC-124/HFC134a/HC-600; (29/59/2)

Refer to SNAP Rule 1 and SNAP Notice 8.

GHG-HP

HCFC Blend Lambda; 

HCFC-22/HCFC142b/HC-600a;

(65/31/4)

Refer to SNAP Notice 4 and SNAP Notice 25.

GHG-X4

R-414A; 

HCFC Blend Xi; 

HCFC-22/HCFC124/HCFC-142b/HC600a;

(51/28.5/16.5/4)

Refer to SNAP Notice 5 and SNAP Notice 25.
3

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability 

Determination for the ODP, GWP, VOC status, flammability rating, and 

exposure limit for each listed substitute.

GHG-X5

HCFC-22/HCFC142b/HFC-227ea/HC600a; (41/15/40/4)

Refer to SNAP Notice 7 and SNAP Notice 25.

HCFC Blend Delta

Free Zone; RB-276; 

HCFC-142b/HFC134a; (19/79)

Refer to SNAP Notice 5 and SNAP Notice 25.

HFC-152a 1,1-difluoroethane; 

CAS # 75-34-3

Refer to SNAP Rule 14 and SNAP Notice 25.

HFO-1234yf 2,3,3,3-tetrafluoro-1-

propene

Refer to SNAP Rule 16.

Hot Shot

R-414B; 

HCFC Blend Omicron; 

HCFC-22/HCFC124/HCFC-142b/HC600a

(50/39/9.5/1.5)

Refer to SNAP Notice 5 and SNAP Notice 25.

Ikon A 

Ikon 12; 

Blend Zeta; 

HFC-134a/HFC152a/CF3I

Refer to SNAP Notice 13. Refer to IPCC Fourth Assessment Report for 

GWP value.

Hot Shot

R-414B; 

HCFC Blend Omicron; 

HCFC-22/HCFC124/HCFC-142b/HC600a;

(50/39/9.5/1.5)

Refer to SNAP Notice 13. Refer to IPCC Fourth Assessment Report for

GWP value.

R-401C

SUVA MP 52; HCFC22/HFC-152a/HCFC124; (33/15/52)

Refer to SNAP Notice 5 and SNAP Notice 25.
4

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability 

Determination for the ODP, GWP, VOC status, flammability rating, and 

exposure limit for each listed substitute.

R-406A

HCFC-22/HCFC142b/HC-600a;

(55/41/4)

Refer to SNAP Notice 1 and SNAP Notice 25.

R-426A

RS-24 (new 

formulation);

HFC-125/HFC-134a/HC600/HC-601a (5.1/93.0/ 

1.3/0.6)

Refer to SNAP Notice 21 and SNAP Notice 25.

SP34E Confidential 

composition

Refer to SNAP Notice 14 and SNAP Notice 25.
5

2 FOAM BLOWING AGENTS

The references to environmental and health properties of acceptable substitutes, substitutes acceptable to use conditions, and substitutes 

whose status will change under the final rule for foam blowing agents are summarized in the tables below. The end-uses included in the foam 

blowing agent sector are the following: Rigid Polyurethane (PU) and Polyisocyanurate (PIR) Laminated Boardstock, Rigid PU: Appliance, Rigid PU: 

Spray, Rigid PU: Commercial Refrigeration, Rigid PU: Sandwich Panels, Rigid PU: Slabstock and Other, Polystyrene: Extruded Boardstock and 

Billet, Phenolic Insulation Board and Bunstock, Integral Skin PU, and Polyolefin. (Substitutes previously listed as unacceptable are not included 

here.)

Table 2. Environmental and Health Properties of Foam Blowing Agents

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability 

Determination for the ODP, GWP, VOC status, flammability rating, 

and exposure limit for each listed substitute.

2-Chloropropane Isopropyl chloride;

CAS # 75-29-6

Refer to SNAP Final Rule, SNAP Notice 13, and SNAP Notice 25.

AB Technology

Reaction of formic acid 

with isocyanate to 

produce carbon 

monoxide and 

water/isocyanate 

reaction to generate 

carbon dioxide for the 

expansion of foam

Refer to SNAP Final Rule.

Acetone 2-propanone;

CAS # 67-64-1

Refer to SNAP Notice 8 and SNAP Notice 25.

Commercial 

blends of HFC365mfc & HFC227ea, w/ 7 to 

13% 227ea and 

remainder 

365mfc

HFC-365mfc is also 

known as 1,1,1,3,3-

pentafluorobutane,

CAS # 405-58-6; HFC227ea is also known as 

1,1,1,2,3,3,3-

heptafluoropropane;

CAS # 431-89-0. 

Refer to SNAP Notice 24 and SNAP Notice 25.
6

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability 

Determination for the ODP, GWP, VOC status, flammability rating, 

and exposure limit for each listed substitute.

Commercial blends 

include 7% HFC227ea/93% HFC-365mfc 

and 13% HFC-227ea/87% 

HFC-365mfc.

Blends of HFC365mfc & HFC245fa, >5% HFC245fa

See other rows in this 

table for more 

information on the 

component blowing 

agents

Refer to SNAP Notice 24 and SNAP Notice 25

C3-C6 Saturated 

light hydrocarbons 

Examples: propane, 

butane, isobutane, npentane, cyclopentane, 

hexane, cyclohexane

Refer to SNAP Notice 1, SNAP Notice 12, and SNAP Notice 25

Carbon Dioxide CO2;

CAS # 124-38-9

Refer to SNAP Rule 14

EcomateTM methyl formate Refer to SNAP Notice 18 and SNAP Notice 21.

Electroset 

Technology

A proprietary process 

that makes organic resins 

electrically 

semiconductive

Refer to SNAP Notice 1 and SNAP Notice 25.

Exxsol Blowing 

Agents

Blend containing light 

saturated hydrocarbons 

with 5 carbons

Refer to SNAP Notice 11 and SNAP Notice 25.
7

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability 

Determination for the ODP, GWP, VOC status, flammability rating, 

and exposure limit for each listed substitute.

HFO–1336mzz(Z)

Formacel® 1100;

(Z)-1,1,1,4,4,4-

hexafluorobut-2-ene;

CAS # 692-49-9

Refer to SNAP Acceptability Determination 29.

Formacel® B HFC Blend; Composition 

is claimed as CBI

Refer to SNAP Notice 23.

Formacel® TI HFC Blend; Composition 

is claimed as CBI

Refer to SNAP Notice 24 and SNAP Notice 25.

Formacel® Z-6 HFC Blend; Composition 

is claimed as CBI

Refer to SNAP Acceptability Determination 27.

Formic Acid

Methanoic acid; 

First listed as Proprietary 

Blowing Agent 1, or PBA 

1;

CAS #64-18-6

Refer to SNAP Notice 5, SNAP Notice 8, and SNAP Notice 25.
8

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability 

Determination for the ODP, GWP, VOC status, flammability rating, 

and exposure limit for each listed substitute.

HCFC-141b and 

blends thereof

1,1-dichloro-1-

fluoroethane;

CAS # 1717-00-6

Refer to the SNAP Final Rule and SNAP Notice 25.

HCFC-142b and 

blends thereof

1-Chloro-1,1-

difluoroethane;

CAS # 75-68-3

Refer to SNAP Final Rule and SNAP Notice 25.

HCFC-22 and 

blends thereof

Chlorodifluoromethane;

CAS # 75-45-6

Refer to SNAP Final Rule and SNAP Notice 25.

HFC-134a

1,1,1,2-

tetrafluoroethane;

CAS # 811-97-2

Refer to SNAP Final Rule, SNAP Notice 10, and SNAP Notice 25.

HFC-143a 1,1,1-trifluoroethane;

CAS # 420-46-2

Refer to SNAP Final Rule and SNAP Notice 1. Refer to IPCC Fourth 

Assessment Report for GWP value.

HFC-152a 1,2-difluoroethane; CAS 

#75-37-6

Refer to SNAP Final Rule, SNAP Notice 10, and SNAP Notice 25.

HFC-152a/ 

Saturated Light 

Hydrocarbon 

Blends

See other rows in this 

table for more 

information on the 

component blowing 

agents

Refer to SNAP Notice 1, SNAP Notice 10, SNAP Notice 12, and SNAP 

Notice 25.
9

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability 

Determination for the ODP, GWP, VOC status, flammability rating, 

and exposure limit for each listed substitute.

HFC-245fa

1,1,1,3,3-

pentafluoroethane;

CAS # 460-73-1

Refer to SNAP Notice 11, SNAP Notice 18, and SNAP Notice 25

HFC-365mfc

1,1,1,3,3-

pentafluorobutane;

CAS # 405-58-6

Refer to SNAP Notice 24 and SNAP Notice 25.

HFO-1234ze

trans-1,3,3,3-

tetrafluoroprop-1-ene;

CAS # -29118-24-9

Refer to SNAP Notice 24 and SNAP Notice 25.

Methyl Formate

Formic acid, Methylester ; 

Methyl methanoate;

CAS # 107-31-3

Refer to SNAP Notice 14 and SNAP Notice 25.

Methylal Dimethoxymethane;

CAS # 109-87-5

Refer to SNAP Acceptability Determination 29.

Methylene 

Chloride

Dichloromethane; 

CAS # 75-09-2

Refer to SNAP Final Rule and SNAP Notice 1. Refer to IPCC Fourth 

Assessment Report for GWP Value.
10

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability 

Determination for the ODP, GWP, VOC status, flammability rating, 

and exposure limit for each listed substitute.

Trans-1-chloro3,3,3-trifluoroprop-1-eneSolsticeTM LBA; 

Solstice 1233zd(E); 

CAS # 102687-65-0

Refer to SNAP Notice 27.

TranscendTM

Technologies

Composition is claimed 

as CBI

Refer to SNAP Notice 20.

Vacuum Panels N/A Refer to SNAP Notice 2 and SNAP Notice 13.

Water H2O;

CAS # 7732-18-5

Refer to SNAP Notice 10.
11

3 AEROSOLS 

The references to environmental and health properties of acceptable substitutes, substitutes acceptable to use conditions, and substitutes 

whose status will change under the final rule for aerosol propellants are summarized in the tables below. (Substitutes previously listed as 

unacceptable are not included here.)

Table 3. Environmental and Health Properties of Aerosols Propellants

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or 

Acceptability Determination for the ODP, GWP, VOC status, 

flammability rating, and exposure limit for each listed 

substitute.

Alternative Processes 

Examples: pumps, 

mechanical pressure 

dispensers, non-spray 

dispensers

Refer to SNAP Final Rule.

C3-C6 Saturated light hydrocarbons Examples: propane, nbutane, isobutane

Refer to SNAP Notice 1, SNAP Notice 12, and SNAP Notice 

25.

Carbon Dioxide CO2;

CAS # 124-38-9

Refer to SNAP Rule 14.

Nitrogen

N2;

CAS # 7727-37-9

Refer to SNAP Final Rule.

Compressed Air N2/O2 ; (79/21) Refer to SNAP Final Rule.

Nitrous Oxide NO2;

CAS # 10024-97-2

Refer to SNAP Final Rule.

Dimethyl Ether

DME; 

Wood ether; 

Dymel A;

CAS # 115-10-6

Refer to SNAP Final Rule. Refer to IPCC Fourth Assessment 

Report for GWP value.

HCFC-142b

1-Chloro-1,1-

difluoroethane; 

CAS ID # 75-68-3

Refer to SNAP Final Rule and SNAP Notice 25.
12

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or 

Acceptability Determination for the ODP, GWP, VOC status, 

flammability rating, and exposure limit for each listed 

substitute.

HCFC-22 Chlorodifluoromethane;

CAS ID # 75-45-6

Refer to SNAP Final Rule and SNAP Notice 25.

HFC-125

1,1,1,2,2-

pentafluoropropane;

CAS ID # 354-33-6

Refer to SNAP Final Rule and SNAP Notice 25. Refer to IPCC 

Fourth Assessment Report for GWP value.

HFC-134a

1,1,1,2-

tetrafluoropropane;

CAS # 811-97-2

Refer to SNAP Final Rule, SNAP Notice 10, and SNAP Notice 

25.

HFC-152a 1,1-difluoroethane;

CAS # 75-34-3

Refer to SNAP Final Rule, SNAP Notice 10, and SNAP Notice 

25.

HFC-227ea

1,1,1,2,3,3,3-

heptafluoropropane;

CAS # 431-89-0

Refer to SNAP Notice 10 and SNAP Notice 25. Refer to the 

IPCC Fourth Assessment Report for GWP value.

HFO-1234ze(E) 

HFC-1234ze;

trans-1,3,3,3-

tetrafluoroprop-1-ene;

CAS # 29118-24-9

Refer to SNAP Notice 25.
13

4 RETAIL FOOD REFRIGERATION

The references to environmental and health properties of acceptable substitutes, substitutes acceptable to use conditions, and substitutes 

whose status will change under the final rule for retail food refrigeration are summarized in the table below. The end-uses included in retail food 

refrigeration are supermarket systems, condensing units, stand-alone equipment, and vending machines. Substitutes that will be newly listed as 

acceptable under SNAP Notice 30 are also listed in the table. (Substitutes previously listed as unacceptable are not included here.)

Table 4. Environmental and Health Properties of Refrigerants in Retail Food Refrigeration

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability Determination 

for the ODP, GWP, VOC status, flammability rating, and exposure limit for each 

listed substitute.

Carbon Dioxide

R-744; 

CO2;

CAS # 124-38-9

Refer to SNAP Rule 14.

FOR12A Composition is claimed 

as CBI

Refer to SNAP Notice 14. Refer to IPCC Fourth Assessment Report for GWP value.

FOR12B Composition is claimed 

as CBI

Refer to SNAP Notice 14. Refer to IPCC Fourth Assessment Report for GWP value.

HFC-134a

HFC-134a;

1,1,1,2-

tetrafluoroethane; 

CAS # 811-97-2

Refer to SNAP Final Rule, SNAP Notice 10, and SNAP Notice 25.

ICOR AT-22

HFC-125/HFC-134a/HC290/HC-600a; (55/42.5/

1/1.5)

Refer to SNAP Notice 20 and SNAP Notice 25.

IKON A

Ikon 12;

Blend Zeta; 

Composition is claimed 

as CBI

Refer to SNAP Notice 13. Refer to IPCC Fourth Assessment Report for GWP value.
14

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability Determination 

for the ODP, GWP, VOC status, flammability rating, and exposure limit for each 

listed substitute.

IKON B Composition is claimed 

as CBI

Refer to SNAP Notice 13. Refer to IPCC Fourth Assessment Report for GWP value.

KDD6 Composition is claimed 

as CBI

Refer to SNAP Notice 23.

R-290 Propane; CARE 40; CAS 

#74-98-6

Refer to SNAP Final Rule, SNAP Rule 17, and SNAP Notice 25.

R-404A HFC-125/HFC-143a/HFC134a; (44/52/ 4)

Refer to SNAP Final Rule and SNAP Notice 17. Refer to IPCC Fourth Assessment 

Report for GWP value.

R-407A

Klea 60; 

Klea 407A;

HFC-32/HFC-125/HFC134a (20/40/40);

CAS # 420-46-2

Refer to SNAP Notice 1, SNAP Notice 23, and SNAP Notice 25.

R-407B

Klea 61;

HFC-32/HFC-125/HFC134a; (10/70/20)

Refer to SNAP Notice 1 and SNAP Notice 25.
15

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability Determination 

for the ODP, GWP, VOC status, flammability rating, and exposure limit for each 

listed substitute.

R-407C

Suva 407C; 

Klea 407C;

HFC-32/HFC-125/HFC134a; (23/25/52)

Refer to SNAP Notice 4, SNAP 17, and SNAP Notice 18. Refer to the IPCC Fourth 

Assessment Report for GWP value.

R-407F

Genetron Performax LT;

HFC-32/HFC-125/HFC134a (30/30/40)

Refer to SNAP Acceptability Determination 26.

R-410A

AZ-20; 

Suva 9100; 

Puron;

HFC-32/HFC-125;

(50/50)

Refer to SNAP Notice 4 and SNAP Notice 17. Refer to the IPCC Fourth Assessment 

Report for GWP value.

R-410B HFC-32/HFC-125;

(45/55)

Refer to SNAP Notice 4 and SNAP Notice 25.

R-417A

ISCEON-59; 

NU-22;

HFC-125/HFC-134a/HC600a; (46.6/50/3.4);

Refer to SNAP Notice 11 and SNAP Notice 25.

R-417C

ICOR; Hot Shot 2; HFC125/HFC-134a/HC-600 

(19.5/78.8/1.7)

Refer to SNAP Acceptability Determination 26.

R-421A

Choice R-421A;

HFC-125/HFC-134a; (58/

42)

Refer to SNAP Notice 21 and SNAP Notice 25.
16

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability Determination 

for the ODP, GWP, VOC status, flammability rating, and exposure limit for each 

listed substitute.

R-422A

ISCEON 79;

HFC-125/HFC-134a/HC600a; (55/42/3)

Refer to SNAP Notice 19. Refer to IPCC Fourth Assessment Report for GWP value.

R-422B

ICOR XAC1;

HFC-125/HFC-134a/HC600a; (55/42/3)

Refer to SNAP Notice 20 and SNAP Notice 25.

R-422C

ICOR XLT1;

HFC-125/HFC-134a/HC600a; (82/15/3)

Refer to SNAP Notice 20 and SNAP Notice 25.

R-422D

ISCEON MO29;

HFC-125/HFC-134a/HC600a; (65.1/31.5/3.4)

Refer to SNAP Notice 21 and SNAP Notice 25.

R-424A

RS-44;

HFC-125/HFC-134a/HC600a/HC-600/HC-601a;

(50.5/47/0.9/1/0.6)

Refer to SNAP Notice 21 and SNAP Notice 25.

R-426A

RS-24 (new 

formulation);

HFC-125/HFC-134a/HC600/HC-601a; (5.1/93/

1.3/0.6)

Refer to SNAP Notice 21 and SNAP Notice 25.
17

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability Determination 

for the ODP, GWP, VOC status, flammability rating, and exposure limit for each 

listed substitute.

R-427A

HFC-32/HFC-125/HFC134a/HFC-143a; (15/25/

50/10)

Refer to SNAP Notice 23 and SNAP Notice 25.

R-437A

MO49 PlusTM; HFC125/HFC-134a/HC600/HC-601 (19.5/78.5/

1.4/0.6)

Refer to SNAP Notice 25.

R-438A

KDD5; 

ISCEON MO99;

HFC-32/HFC-125/HFC134a/HC-600/HC-601a;

(8.5/45.0/44.2/1.7/0.6)

Refer to SNAP Notice 24 and SNAP Notice 25.

R-441A

HCR-188C;

HC-170/HC-290/HC600/HC-600a; (3.1/54.8/

36.1/6.0)

Refer to SNAP Rule 17.

R-448A

Solstice® N-40; HFC32/HFC-125/HFC134a/HFO-1234yf/HFO1234ze(E); 

(26/26/21/20/7)

Refer to SNAP Notice 30.

R-449A

Opteon® XP 40; HFC32/HFC-125/HFC134a/HFO-1234yf; 

(24.3/24.7/25.7/25.3)

Refer to SNAP Notice 30.

R-450A

Solstice® N–13; 

HFC-134a/HFO1234ze(E); (42/58)

Refer to SNAP Acceptability Determination 29.
18

Substitute Name

Further Identification 

Information for 

Substitute

Reference to the applicable SNAP Rule, Notice, or Acceptability Determination 

for the ODP, GWP, VOC status, flammability rating, and exposure limit for each 

listed substitute.

R-507A

HFC-125/HFC-143a; (50/

50)

Refer to SNAP Final Rule, SNAP Notice 5, SNAP Notice 17, and SNAP Acceptability 

Determination 26.

R-513A

Opteon® XP 10; HFC134a/HFO-1234yf 

(44/56)

Refer to SNAP Notice 30.

R-600a

2-methylpropane; 

isobutane

Refer to SNAP Rule 17.

R-717 Ammonia; NH3;

CAS # 7664-41-7

Refer to SNAP Final Rule, SNAP Notice 5, and SNAP Notice 25.

RS-24 (2002 

formulation)

Composition is claimed 

as CBI

Refer to SNAP Notice 17 and SNAP 25.

RS-44 (2003 

formulation)

Composition is claimed 

as CBI

Refer to SNAP Notice 18 and SNAP Notice 25.

SP34E Composition is claimed 

as CBI

Refer to SNAP Notice 14, SNAP Notice 15, and SNAP Notice 25.

THR-02 Composition is claimed 

as CBI

Refer to SNAP Notice 11.

THR-03 Composition is claimed 

as CBI

Refer to SNAP Notice 11.
19

REFERENCES

Forster, P., V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D.W. Fahey, J. Haywood, J. Lean, D.C. Lowe, 

G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schulz and R. Van Dorland. 2007. Changes in Atmospheric 

Constituents and in Radiative Forcing. In: Climate Change 2007: The Physical Science Basis. Contribution 

of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change 

[Solomon, S., D. Qin, M. Manning, Z. Chen, M. Marquis, K.B. Averyt, M.Tignor and H.L. Miller (eds.)]. 

Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA.

U.S. EPA. 1994. SNAP Final Rule. March 18, 1994. Available online at: 

http://www.epa.gov/ozone/fedregstr/59fr13044.html.

U.S. EPA. 2010. Summary of Substitute Refrigerants Listed in SNAP Notice 25. Available online at: 

http://www.epa.gov/ozone/snap/refrigerants/Notice25SubstituteRefrigerants.pdf

U.S. EPA. 2014. Substitute Refrigerants under SNAP as of October 21, 2014. Available online at: 

http://www.epa.gov/ozone/snap/refrigerants/reflist.pdf

U.S. EPA. 2015a. SNAP Regulations: SNAP Notices of Acceptability (Notices 1, 4, 5, 7, 8, 10, 11, 12, 13, 14, 

15, 20, 21, 23, 24, 26, 27, 29, and 30). Available online at: 

http://www.epa.gov/spdpublc/snap/regulations.html

U.S. EPA. 2015b. SNAP Regulations: SNAP Rules (Rules 1, 14, 16, and 17). Available online at: 

http://www.epa.gov/spdpublc/snap/regulations.html