From: Comparison of seven in silico tools for evaluating of daphnia and fish acute toxicity: case study on Chinese Priority Controlled Chemicals and new chemicals
Toxicity range (mg/L)
Class
LC50 ≤ 1
1 (very toxic)
1 < LC50 ≤ 10
2 (toxic)
10 < LC50 ≤ 100
3 (harmful)
LC50 > 100
4 (not harmful)