LD50 Calculator
Calculate LD50 (median lethal dose) from dose-mortality data using probit analysis.
Dose-Mortality Data
Dose (mg/kg)
% Mortality
LD50 Definition
The dose at which 50% of test subjects die. Used to assess acute toxicity of substances.
LD50
158.7 mg/kg
95% CI: 37.9 mg/kg - 664.7 mg/kg
Lethal Dose Parameters
LD10 (Low toxicity)50.0 mg/kg
LD50 (Median)158.7 mg/kg
LD90 (High toxicity)400.0 mg/kg
Safety Margin (LD50/LD10)3.17x
Toxicity Classification
< 5 mg/kgExtremely toxic
5-50 mg/kgHighly toxic
50-500 mg/kgModerately toxic
500-5000 mg/kgSlightly toxic
> 5000 mg/kgPractically non-toxic
Data Summary
| Dose | % Mortality |
|---|---|
| 10.0 mg/kg | 0% |
| 50.0 mg/kg | 10% |
| 100.0 mg/kg | 30% |
| 200.0 mg/kg | 60% |
| 400.0 mg/kg | 90% |