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Lesotho - Final Regulatory Action
Dieldrin CAS number:
Date circular:

Chemical name: 2,7:3,6-Dimethanonaphth[2,3-b]oxirene, 3,4,5,6,9,9-hexachloro-1a,2,2a,3,6,6a,7,7a-octahydro-, (1a.alpha.,2.beta.,2a.alpha.,3.beta.,6.beta.,6a.alpha.,7

Final regulatory action has been taken for the category: Pesticide

Final regulatory action: The chemical is Banned

Use or uses prohibited by the final regulatory action:

All uses and formulations are prohibited

Pesticide use or uses that remain allowed:


The final regulatory action was based on a risk or hazard evaluation: Yes

Summary of the final regulatory action:

Dieldrin was banned in the Environment Act 2008

The reasons for the final regulatory action were relevant to: Human health

Summary of known hazards and risks to human health:

Dieldrin and aldrin, which rapidly convert to dieldrin in the environment and in the
human body, have been subjected to control actions principally due to their high
toxicity to man and many animals, to their persistence in the environment, and to their
Form for notification of final regulatory action to ban or severely restrict a chemical Page 4
bioaccumulation in the food chain and in human tissues.
Dieldrin is highly toxic to human beings, with short-term, high levels of exposure
causing headache, dizziness, and tremors followed by convulsions, loss of
consciousness and possibly death. Oral doses of aldrin and dieldrin have caused liver
cancer in mice but not rats.

Expected effect of the final regulatory action in relation to human health:

The ban is expected to eliminate hazards, thereby reduced exposure of
diedrin to human health

Date of entry into force of the final regulatory action: 16/06/2009

This notification did not meet the requirements of Annex I to the Convention.