The Montreal Protocol on Substances that Deplete the Ozone Layer

Annex B: Controlled substances

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Group Substance Ozone-Depleting Potential
Group I
CF3Cl (CFC‑13) 1.0
C2FCl5 (CFC‑111) 1.0
C2F2Cl4 (CFC‑112) 1.0
C3FCl7 (CFC‑211) 1.0
C3F2Cl6 (CFC‑212) 1.0
C3F3Cl5 (CFC‑213) 1.0
C3F4Cl4 (CFC‑214) 1.0
C3F5Cl3 (CFC‑215) 1.0
C3F6Cl2 (CFC‑216) 1.0
C3F7Cl (CFC‑217) 1.0
Group II
CCl4 carbon tetrachloride 1.1
Group III
C2H3Cl3* 1,1,1-trichloroethane* (methyl chloroform) 0.1

* This formula does not refer to 1,1,2-trichloroethane.



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