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Health Effects Assessment Summary (HEAST) for

Malathion

CAS: 000121-75-5


Summary of HEAST Information on-Line

Subchronic and Chronic Toxicity
Chronic [RfD]:IRIS
Subchronic [RfD]:on-Line
Notes/Comments:on-Line






Subchronic and Chronic Toxicity (Other than Carcinogenicity)

Subchronic [RfD]:
(see comment)
2E-2 mg/kg/day

Uncertainty Factor: 10

Route: Oral: capsule

Target Organ / Critical Effect: Blood / Hematological effects

Species Effect Level Dose Experiment Length
Human NOEL 0.23 mg/kg/day 47 days

References
1962 Moeller H.C. and J.A. Rider. 1962. Plasma and red blood cell-cholinesterase activity as indications of the threshold of incipient toxicity of Ethyl-p-nitrophenol Thionebenzenephosphorate (EPN) and Malathion in human beings. Toxicol Appl Pharmacol. 4: 123-130.
1984 U.S. EPA. 1984. Health and environmental effects profile for Malathion. Prepared by the Office of Health and Environmental Assessment, Environmental Criteria and Assessment Office, Cincinnati, OH for the Office of Solid Waste, Washington, DC
1987 U.S. EPA. 1987. RfD/RfC Work Group.

Subchronic [RfD] Comments: The chronic oral RfD was adopted as the subchronic oral [RfD].



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