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Health Effects Assessment Summary (HEAST) for

Calcium Cyanide

CAS: 000592-01-8


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)
4E-2 mg/kg/day

Uncertainty Factor: 500

Route: Oral: diet

Target Organ / Critical Effect: Whole body / Decreased weight
Thyroid / Effects
Nerve / Myelin degeneration

Species Effect Level Dose Experiment Length
Rat NOAEL 19.1 mg/kg/day 2 years

References
1955 Howard J.W. and R.F. Hanzal. 1955. Chronic toxicity for rats of food treated with Hydrogen Cyanide. Agric Food Chem. 3: 325-329.
1979 Philbrick D.J., J.B. Hopkins, D.C. Hill, J.C. Alexander and R.G. Thomson. 1979. Effects of prolonged Cyanide and Thiocyanate feeding in rats. J Toxicol Environ Health. 5: 579-592.
1985 U.S. EPA. 1985. RfD/RfC Work Group.

Subchronic [RfD] Comments: Calculated by analogy to free cyanide by correcting for differences in molecular weight. The chronic oral RfD was adopted as the subchronic oral [RfD].



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