LD50 Rat Fischer-344 male oral 443 mg/kg (95% confidence limits 270-1103 mg/kg) (2,4-D acid in corn oil).
U.S. Department of the Interior, Fish and Wildlife Service. Handbook of Toxicity of Pesticides to Wildlife. Resource Publication 153. Washington, DC: U.S. Government Printing Office, 1984. 26.
LD50 for 3 week old chicks (M, F) by oral administration of undiluted 2,4-D/2,4,5-T (1:1) was 4000 mg/kg (2700-5900 mg/kg). Acid equivalent was not specified. /From table/
Rowe VK, Hymas TA; Am J Vet Res 15: 622-9 (1954) as cited in WHO; Environ Health Criteria 29: 2,4-Dichlorophenoxyacetic Acid (2,4-D) p.66 (1984).
