How to consider engineered nanomaterials in major accident regulations?

Environmental Sciences Europe

Table 3 LC ₅₀ values (mg/l) for fish for different ENM: comparison between nano-form and microform/dissolved metals

	LC₅₀fish
	ENM lowest reported value (mg/l)	Larger particles or dissolved ions^e	Rounded ratio (nano/micro)
Nano-TiO₂	2 [55]^a	>100 [64]	>1:10
Nano-ZnO	1.8 [65]^b	1 [58]^f	1:1
CNT	20 [66]^c	-	-
Nano-Ag	0.025 [67]^d	0.003 [59]	10:1

^aOther values: 125 mg/l [68], 500 mg/l [69]; ^bother value: 4.92 mg/l [68]; ^cLOEC value, no LC₅₀ available; ^dother values (in mg/l): 0.028 [32], 1.25 to 1.36/9.4 to 10.6 [70], 7.07 [71]; ^efor Ag and ZnO, the values for the dissolved metals were taken; ^faverage 30-day EC₅₀ for dissolved Zn (range 0.3 to 1.9 mg/l).