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Ozone depleting substances and the greenhouse gases HFCs, PFCs and SF6
Appendix 1
ODP values for ozone-depleting substances and GWP values for clean greenhouse gases
Table 1.A Ozone-depleting substances, their chemical formulas and ODP values regulated by the Montreal Protocol
| Substance |
Chemical formula |
ODP values |
CFCs
CFC-11
CFC-12
CFC-113
CFC-115
Other CFCs |
CFCl3
CF2Cl2
C2F3Cl3
C2F5Cl
- |
1.0
1.0
0.8
0.6
- |
| Tetrachloromethane |
CCl4 |
1.1 |
| 1,1,1-trichloroethane |
CH3CCl3 |
0.1 |
Halons
Halon-1301
Halon-1211
Halon-2402 |
CF3Br
CF2BrCl
CF2BrCF2Br |
10
3
6 |
| Methyl bromide |
CH3Br |
0.6 (1) |
HCFCs
HCFC-22
HCFC-123
HCFC-141b
HCFC-142b |
CHF2Cl
C2HCL2F3
C2H3FCl2
C2H3F2Cl |
0.055
0.02
0.11
0.065 |
(1) Changed from 0.7 to 0.6 at the 7th Meeting of the Parties to the Montreal Protocol, December 1995. 0.6 is used in the calculations for 1996 and 1997.
Table 1.B Pure(1) greenhouse gases, their chemical formulas and GWP values, stipulated in the Kyoto Protocol
| Substance |
Chemical formula |
GWP value |
HFCs
HFC-32
HFC-125
HFC-134a
HFC-143a
HFC-152a
HFC-245
HFC-227
HFC-365
HFC-404a(2)
HFC-401a(3)
HFC-402a(4)
HFC-407c(5)
HFC-408a(6)
HFC-409a(7)
HFC-410a(8)
HFC-507a(9) |
CH2FH2
C2HF5
CF3CFH2
C2H3F3
CF2HCH3
C3HF7
-
- |
650
2,800
1,300
3,800
140
950
2,900
890
3,260
18
1,680
1,525
1,030
0
1,725
3,300 |
| Sulphur hexafluoride |
SF6 |
23,900 |
Perfluorinated hydrocarbons
Tetrafluoromethane
(perfluoromethane)
Fluoroethane
(perfluoroethane)
Fluoropropane
(perfluoropropane)
Fluorocyclobutane
(perfluorocyclobutane)
Fluorohexane
(perfluorohexane) |
CF4
C2F6
C3F8
C-C4F8
C6F14 |
6,500
9,200
7,000
8,700
7,400 |
(1) No ozone-depleting effect.
(2) Mixture consisting of 52 per cent HFC-143a, 44 per cent HFC-125 and 4 per cent HFC-134a. The GWP value is determined from this.
(3) Mixture consisting of 53 per cent HCFC-22, 13 per cent HFC-152a and 34 per cent HCFC-124. The GWP value is determined from this.
(4) Mixture consisting of 38 per cent HCFC-22, 60 per cent HFC-125 and 2 per cent propane. The GWP value is determined from this.
(5) Mixture consisting of 25 per cent HFC-125, 52 per cent HFC-134a, and 23 per cent HFC-32. The GWP value is determined from this.
(6) Mixture consisting of 46 per cent HFC-143a and 7 per cent HFC-125. The GWP value is determined from this.
(7) A HFCFC mixture consisting entirely of HCFCs, where the GWP value - in accordance with the climate convention guidelines - is 0, since the mixture does not contain greenhouse gases. The real GWP value is 1,440.
(8) Mixture consisting of 50 per cent HFC-32 and 50 per cent HFC-125
(9) Mixture consisting of 50 per cent HFC-125, 50 per cent HFC-134a. The GWP value is determined from this.
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Version 1.0 February 2004, © Danish Environmental Protection Agency
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