Difethialone is an anticoagulant used as a rodenticide. It is considered a second generation agent.
In May 2008, the EPA added restrictions on the sale of difethialone in consumer-use rodenticide products and also for exterior use by commercial applicators.
References
Nahas K, Lorgue G, Mazallon M (1989). "Difethialone (LM-2219): a new anticoagulant rodenticide for use against warfarin-resistant and -susceptible strains of Rattus norvegicus and Mus musculus". Annales de Recherches Vétérinaires. 20 (2): 159–64. PMID 2751229. https://hal.archives-ouvertes.fr/hal-00901856 ↩
Saravanan K, Kanakasabai R, Thiyagesan K (June 2003). "Field evaluation of difethialone, a new second generation anticoagulant rodenticide in the rice fields". Indian Journal of Experimental Biology. 41 (6): 655–8. PMID 15266918. /wiki/PMID_(identifier) ↩
EPA, OCSPP, OPP, US (2014-03-04). "Restrictions on Rodenticide Products". www.epa.gov. https://www.epa.gov/rodenticides/restrictions-rodenticide-products ↩
"Regulations.gov". www.regulations.gov. https://www.regulations.gov/document?D=EPA-HQ-OPP-2006-0955-0764 ↩