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Health Effects Assessment Summary (HEAST) for

Nitrite

CAS: 014797-65-0


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)
1E-1 mg/kg/day

Uncertainty Factor: 10

Route: Oral: water

Target Organ / Critical Effect: Blood / Methemoglobinemia

Species Effect Level Dose
Human NOEL 10 ppm

References
1951 Walton G. 1951. Survey of literature relating to infant methemoglobinemia due to Nitrate-contaminated water. Am J Pub Health. 41: 986-996.
1989 U.S. EPA. 1989. Health and environmental effects document for Nitrite. 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
1992 U.S. EPA. 1992. RfD/RfC Work Group.

Subchronic [RfD] Comments: This value is based on nitrate (nitrogen) data from the most sensitive human population (infants). The chronic oral RfD was adopted as the subchronic oral [RfD].



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