McClellan oscillator

Group	Oral Toxicity LD50 $\frac{mg}{kg}$	Dermal Toxicity LD50 $\frac{mg}{kg}$	Inhalation Toxicity (Dust/Mist) LC50 $\frac{mg}{L}$
I	$\le 5$	$\le 40$	$\le 0.5$
II	$\ge 5$ but $\le 50$	$\ge 40$ but $\le 200$	$\ge 0.5$ but $\le 2$
III	solids: $\ge 50$ but $\le 200$ liquids: $\ge 50$ but $\le 500$	$\ge 200$ but $\le 1000$	$\ge 2$ but $\le 10$