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Togo - Final Regulatory Action
Hexazinone CAS number:
Date circular:

Chemical name: 1,3,5-Triazine-2,4(1H,3H)-dione, 3-cyclohexyl-6-(dimethylamino)-1-methyl-

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 formulations containing Hexazinon are banned
All uses are banned

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:

On recommendation of the Sahelian Pesticide Committee (CSP), Decision N003/MC/2017 to ban all products containing Hexazinon was signed on 20 March 2017 by CILSS coordinating Ministry.
The final regulatory action entered into force on 20 March 2017.
The use of all pesticides containing Hexazinon has been banned due to its potential for water contamination. The import, the manufacture for domestic use, distribution and sale are also banned.

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

Summary of known hazards and risks to human health:

High risk of surface and groundwater contamination by Hexazinon
oThe fragile ecology of CILSS countries sometimes characterised by torrential rainfall on soils which are very often poor in organic matter and therefore subject to erosion and leaching ;
oThe absence of an environmental management system respecting buffer stripes between treated fields and streams; this precaution is not possible in the Sahel, entailing an unacceptable risk to human health and the environment
oHexazinon is highly mobile in soil (Koc, GUS) s.
oA Canadian study showed that 40% of sampled drinkable water intakes contained up to 6.7 g/l of Hexazinon. In the Sahel, ground water is used as drinking water reservoir and surface water is used for humans and animals, which represents an unacceptable risk to human health and the environment.
oCanada has asked buffer stripes in certain sensible areas due to contamination risks to groundwater.
Potential risk of human exposure through surface and ground water contamination by Hexazoinone :
othe use of surface water as drinking water for humans and animals. ;
the use of groundwater as drinking water reservoir;

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

Reduction of risks to human health posed by the use of pesticides containing Hexazinon

Summary of known hazards and risks to the environment:

High risk to non targeted terrestrial plants ;
High long term risk to herbivorous birds and aquatic organisms in a fragile ecosystem already in danger of extinction ;
High short-term risk to birds drinking contaminated water after treatment;
Risk of soil impoverishment in the Sahel

Expected effect of the final regulatory action in relation to the environment:

Reduction of risks to the environment posed by the use of pesticides containing Hexazinon

Date of entry into force of the final regulatory action: 20/03/2017