Guidance

Ozone-depleting substances (ODS)

Groups of ODS with their ozone-depleting potential.

If you work with ozone-depleting substances (ODS) there are rules you must follow.

You must:

  • hold a licence to import or export ODS
  • have a quota to import or produce ODS
  • record and report ODS that you import, export, sell or destroy
  • be qualified to service equipment containing ODS
  • use a qualified technician to check for ODS leaks in equipment you own
  • register if you need to use ODS for laboratory or analytical purposes

You must not use hydrochlorofluorocarbons (HCFCs), including recycled or reclaimed HCFCs:

  • in new equipment.
  • to service equipment.

You can still use equipment that contains HCFCs.

The ozone-depleting potential values in the following tables are estimates and are reviewed regularly.

Group 1

Industrial designation Chemical formula Chemical name (common name) Ozone-depleting potential
CFC-11 CFCl3 Trichlorofluoromethane 1.0
CFC-12 CF2Cl2 Dichlorodifluoromethane 1.0
CFC-113 C2F3Cl3 Trichlorotrifluoroethane 0.8
CFC-114 C2F4Cl2 Dichlorotetrafluoroethane 1.0
CFC-115 C2F5Cl Chloropentafluoroethane 0.6

Group 2

Industrial designation Chemical formula Chemical name (common name) Ozone-depleting potential
CFC-13 CF3Cl Chlorotrifluoromethane 1.0
CFC-111 C2FCl5 Pentachlorofluoroethane 1.0
CFC-112 C2F2Cl4 Tetrachlorodifluoroethane 1.0
CFC-211 C3FCl7 Heptachlorofluoropropane 1.0
CFC-212 C3F2Cl6 Hexachlorodifluoropropane 1.0
CFC-213 C3F3Cl5 Pentachlorotrifluoropropane 1.0
CFC-214 C3F4Cl4 Tetrachlorotetrafluoropropane 1.0
CFC-215 C3F5Cl3 Trichloropentafluoropropane 1.0
CFC-216 C3F6Cl2 Dichlorohexafluoropropane 1.0
CFC-217 C3F7Cl Chloroheptafluoropropane 1.0

Group 3

Industrial designation Chemical formula Chemical name (common name) Ozone-depleting potential
halon-1211 CF2BrCl Bromochlorodifluoromethane 3.0
halon-1301 CF3Br Bromotrifluoromethane 10.0
halon-2402 C2F4Br2 Dibromotetrafluoroethane 6.0

Group 4

Industrial designation Chemical formula Chemical name (common name) Ozone-depleting potential
CTC CCl4 Tetrachloromethane (carbon tetrachloride) 1.1

Group 5

Industrial designation Chemical formula Chemical name (common name) Ozone-depleting potential
1,1,1-TCA C2H3Cl3 (this formula does not refer to 1,1,2-trichloroethane) 1,1,1-Trichloroethane (methylchloroform) 0.1

Group 6

Industrial designation Chemical formula Chemical name (common name) Ozone-depleting potential
methyl bromide CH3Br Bromomethane 0.6

Group 7

Industrial designation Chemical formula Chemical name (common name) Ozone-depleting potential
HBFC-21 B2 CHFBr2 Dibromofluoromethane 1.00
HBFC-22 B1 CHF2Br Bromodifluoromethane 0.74
HBFC-31 B1 CH2FBr Bromofluoromethane 0.73
HBFC-121 B4 C2HFBr4 Tetrabromofluoroethane 0.8
HBFC-122 B3 C2HF2Br3 Tribromodifluoroethane 1.8
HBFC-123 B2 C2HF3Br2 Dibromotrifluoroethane 1.6
HBFC-124 B1 C2HF4Br Bromotetrafluoroethane 1.2
HBFC-131 B3 C2H2FBr3 Tribromofluoroethane 1.1
HBFC-132 B2 C2H2F2Br2 Dibromodifluoroethane 1.5
HBFC-133 B1 C2H2F3Br Bromotrifluoroethane 1.6
HBFC-141 B2 C2H3FBr2 Dibromofluoroethane 1.7
HBFC-142 B1 C2H3F2Br Bromodifluoroethane 1.1
HBFC-151 B1 C2H4FBr Bromofluoroethane 0.1
HBFC-221 B6 C3HFBr6 Hexabromofluoropropane 1.5
HBFC-222 B5 C3HF2Br5 Pentabromodifluoropropane 1.9
HBFC-223 B4 C3HF3Br4 Tetrabromotrifluoropropane 1.8
HBFC-224 B3 C3HF4Br3 Tribromotetrafluoropropane 2.2
HBFC-225 B2 C3HF5Br2 Dibromopentafluoropropane 2.0
HBFC-226 B1 C3HF6Br Bromohexafluoropropane 3.3
HBFC-231 B5 C3H2FBr5 Pentabromofluoropropane 1.9
HBFC-232 B4 C3H2F2Br4 Tetrabromodifluoropropane 2.1
HBFC-233 B3 C3H2F3Br3 Tribromotrifluoropropane 5.6
HBFC-234 B2 C3H2F4Br2 Dibromotetrafluoropropane 7.5
HBFC-235 B1 C3H2F5Br Bromopentafluoropropane 1.4
HBFC-241 B4 C3H3FBr4 Tetrabromofluoropropane 1.9
HBFC-242 B3 C3H3F2Br3 Tribromodifluoropropane 3.1
HBFC-243 B2 C3H3F3Br2 Dibromotrifluoropropane 2.5
HBFC-244 B1 C3H3F4Br Bromotetrafluoropropane 4.4
HBFC-251 B1 C3H4FBr3 Tribromofluoropropane 0.3
HBFC-252 B2 C3H4F2Br2 Dibromodifluoropropane 1.0
HBFC-253 B1 C3H4F3Br Bromotrifluoropropane 0.8
HBFC-261 B2 C3H5FBr2 Dibromofluoropropane 0.4
HBFC-262 B1 C3H5F2Br Bromodifluoropropane 0.8
HBFC-271 B1 C3H6FBr Bromofluoropropane 0.7

Group 8

Industrial designation Chemical formula Chemical name (common name) Ozone-depleting potential
HCFC-21* CHFCl2 Dichlorofluoromethane 0.040
HCFC-22* CHF2Cl Chlorodifluoromethane 0.055
HCFC-31 CH2FCl Chlorofluoromethane 0.020
HCFC-121 C2HFCl4 Tetrachlorofluoroethane 0.040
HCFC-122 C2HF2Cl3 Trichlorodifluoroethane 0.080
HCFC-123* C2HF3Cl2 Dichlorotrifluoroethane 0.020
HCFC-124* C2HF4Cl Chlorotetrafluoroethane 0.022
HCFC-131 C2H2FCl3 Trichlorofluoroethane 0.050
HCFC-132 C2H2F2Cl2 Dichlorodifluoroethane 0.050
HCFC-133 C2H2F3Cl Chlorotrifluoroethane 0.060
HCFC-141 C2H3FCl2 Dichlorofluoroethane 0.070
HCFC-141b* CH3CFCl2 1,1-Dichloro-1-fluoroethane 0.110
HCFC-142 C2H3F2Cl Chlorodifluoroethane 0.070
HCFC-142b* CH3CF2Cl 1-Chloro-1,1-difluoroethane 0.065
HCFC-151 C2H4FCl Chlorofluoroethane 0.005
HCFC-221 C3HFCl6 Hexachlorofluoropropane 0.070
HCFC-222 C3HF2Cl5 Pentachlorodifluoropropane 0.090
HCFC-223 C3HF3Cl4 Tetrachlorotrifluoropropane 0.080
HCFC-224 C3HF4Cl3 Trichlorotetrafluoropropane 0.090
HCFC-225 C3HF5Cl2 Dichloropentafluoropropane 0.070
HCFC-225ca* CF3CF2CHCl2 3,3-Dichloro-1,1,1,2,2-pentafluoropropane 0.025
HCFC-225cb* CF2ClCF2CHClF 1,3-Dichloro-1,1,2,2,3-pentafluoropropane 0.033
HCFC-226 C3HF6Cl Chlorohexafluoropropane 0.100
HCFC-231 C3H2FCl5 Pentachlorofluoropropane 0.090
HCFC-232 C3H2F2Cl4 Tetrachlorodifluoropropane 0.100
HCFC-233 C3H2F3Cl3 Trichlorotrifluoropropane 0.230
HCFC-234 C3H2F4Cl2 Dichlorotetrafluoropropane 0.280
HCFC-235 C3H2F5Cl Chloropentafluoropropane 0.520
HCFC-241 C3H3FCl4 Tetrachlorofluoropropane 0.090
HCFC-242 C3H3F2Cl3 Trichlorodifluoropropane 0.130
HCFC-243 C3H3F3Cl2 Dichlorotrifluoropropane 0.120
HCFC-244 C3H3F4Cl Chlorotetrafluoropropane 0.140
HCFC-251 C3H4FCl3 Trichlorofluoropropane 0.010
HCFC-252 C3H4F2Cl2 Dichlorodifluoropropane 0.040
HCFC-253 C3H4F3Cl Chlorotrifluoropropane 0.030
HCFC-261 C3H5FCl2 Dichlorofluoropropane 0.020
HCFC-262 C3H5F2Cl Chlorodifluoropropane 0.020
HCFC-271 C3H6FCl Chlorofluoropropane 0.030

Group 9

Industrial designation Chemical formula Chemical name (common name) Ozone-depleting potential
BCM CH2BrCl Bromochloromethane 0.12

ODS banned except for use for feedstock, laboratory or analytical purposes

These ODS are not covered by licensing or quotas.

Chemical formula Chemical name (common name) Ozone-depleting potential
#CBr2 F2 Dibromodifluoromethane (halon-1202) 1,25

ODS you must report on

These ODS are not banned or covered by licensing or quotas but you must report on imports and exports.

Chemical formula Chemical name (common name) Ozone-depleting potential
#C3H7Br 1-Bromopropane (n-propyl bromide) 0,02 — 0,10
#C2H5Br Bromoethane (ethyl bromide) 0,02 — 0,10
#CF3I Trifluoroiodomethane (trifluoromethyl iodide) 0,01 — 0,02
#CH3Cl Chloromethane (methyl chloride) 0,02

Banned ODS

You must not use hydrochlorofluorocarbons (HCFCs), including recycled or reclaimed HCFCs:

  • in new equipment.
  • to service equipment.

You can still use equipment that contains HCFCs.

Published 7 February 2019
Last updated 1 December 2020 + show all updates
  1. Added tables of ODS with restrictions.

  2. First published.