Document ID: chunk:federal_register_of_legislation:C2012C00841:clause:1_88
Version: federal_register_of_legislation:C2012C00841
Segment Type: clause
Provision Reference: sch 1 cl 88
Character Range: 33295–34078

88  Paragraph 4(c) of Annex I to the Convention set out in Schedule 2
Repeal the paragraph, substitute:
  (c) Chlorine substances
         (i) Fully halogenated alkanes, e.g. CCl4, CFCl3 (CFC‑11), CF2Cl2 (CFC‑12), C2F3Cl3 (CFC‑113), C2F4Cl2 (CFC‑114)
     Fully halogenated alkanes are anthropogenic and act as a source of ClOx, which plays a vital role in ozone photochemistry, especially in the 30‑50 km altitude region.
         (ii) Partially halogenated alkanes, e.g. CH3Cl, CHF2Cl (CFC‑22), CH3CCl3, CHFCl2 (CFC‑21)
     The sources of CH3Cl are natural, whereas the other partially halogenated alkanes mentioned above are anthropogenic in origin. These gases also act as a source of stratospheric ClOx.
Note: This item fixes a mistranscription of the text of the Convention.