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Health Effects Assessment Summary (HEAST) for
Methyl Parathion
CAS: 000298-00-0
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Summary of HEAST Information on-Line
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| Subchronic and Chronic Toxicity |
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Subchronic and Chronic Toxicity
(Other than Carcinogenicity) |
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| Subchronic [RfD]: |
2E-3 mg/kg/day |
| Uncertainty Factor: |
100 |
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| Target Organ / Critical Effect: |
Erythrocytes / Cholinesterase inhibition |
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| Species |
Effect Level |
Dose |
Experiment Length |
| Rat |
NOAEL |
2.5 ppm |
90 days |
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| References |
| 1980 | Daly, I.W. and W.E. Rinehart. 1980. A three-month feeding study of Methyl Parathion in rats: Project 77-2054. MRID No. 74299. Available from EPA, write to FOI, EPA, Washington, DC 20460. |
| 1991 | U.S. EPA. 1991. Health and enviornmental effects document for Methyl Parathion. Prepared by the Office of Health and Environmental Assessment, Environmental Criteria and Assessment Office, Cincinnati, OH for the Office of Solid Waste and Emergency Response, Washington, DC |
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