LD₅₀ / LC₅₀

Layer 3 — Biologyin the toxicology subtree

Dose (or environmental concentration) killing 50% of a test population. Standard (if blunt) acute-toxicity ranking: LD₅₀ < 5 mg/kg (extremely toxic) to > 15 g/kg (practically non-toxic). Gradually displaced by benchmark-dose and…

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