Table 1. Values of ID₅₀ and IC₅₀ obtained after exposure of mES and NIH3T3 cells to NMs.

	TiO2		ZnO		SiO2
	NM-103	NM-104	NM-110	NM-111	NM-200	NM-203
IC 50 3T3 (μg/ml)	37.4	>100	1.09	0.4	45	52
IC 50 ES (μg/ml)	11.4	23.5	11.08	15.5	>100	21.8
ID 50 (μg/ml)	4.6	<1	15.9	11.5	>100	>100
Embryotoxicity classification	Weak-embryotoxic	Weak-embryotoxic	Non-embryotoxic	Non-embryotoxic	Non-embryotoxic	Non-embryotoxic