Over the next ten years the United States released approximately eleven million gallons of an equal measure of 2,4,5-T and 2,4-D, which came to be known as Agent Orange, over the South Vietnamese countryside.
The Mrak Report supported the conclusions of the Bionetics study, and recommended that 2,4-D and 2,4,5-T both be immediately restricted to prevent human exposure.
Ruckelshaus decided, however, to continue the existing restrictions on 2,4,5-T in contradiction to the advisory committee's recommendation.
Determining the toxicity of 2,4,5-T remained an elusive process, although evidence slowly mounted.
He referred them to more studies and scientists who had expressed concern about the safety of 2,4-D, 2,4,5-T, and the TCDD present in the herbicides used to clear roadways and manage local timber stands.
41) In March, Judge Otto Skopil issued a temporary injunction banning the use of 2,4,5-T and Silvex pending Forest Service explanation of the effects of dioxin on human and animal health.
Dow used several strategies to discredit the possible link between 2,4,5-T sprayings and miscarriages.
Scientists continued to debate the safety of 2,4,5-T and its associated dioxin contamination, even as the EPA fought to maintain its emergency suspension of the chemical.
Johnson, Vice President, Dow Chemical Company, April 7 and 15, 1970," Hearings Before the Subcommittee on Energy, Natural Resources, and the Environment of the Committee on Commerce; United States Senate, Ninety-First Congress, Second Session on Effects of 2,4,5-T on Man and the Environment, April 7 and 15, 1970 (Washington, D.
Sterling, "Difficulty of Evaluating the Toxicity and Teratogenicity of 2,4,5-T from Existing Animal Experiments," Science, n.
44) Jeffrey Smith, "EPA Halts Most Use of Herbicide 2,4,5-T," Science, n.