Lung inflammation and lack of genotoxicity in the comet and micronucleus assays of industrial multiwalled carbon nanotubes Graphistrength © C100 after a 90-day nose-only inhalation exposure of rats

Table 11 Results of the micronucleus assay in the bone marrow of male and female rats 24 h after a 90-day exposure to Graphistrength^© C100

Test groups	Concentration / dose level	PCEs with micronuclei (%)	Range^a	PCE per 2000 erythrocytes
(n = 5/group)	(mg/m³)
MALE
Air control	0	0.340	2 - 17	1099
Graphistrength^© C100	0.05	0.440	5 - 11	1073
	0.25	0.280	2 - 10	1094
	5.00	0.210	3 - 8	1081
Positive control^b	20	0.833*	10 - 26	806
FEMALE
Vehicle	0	0.290	3 - 9	1155
Graphistrength^© C100	0.05	0.210	1 - 8	1223
	0.25	0.190	1 - 5	1147
	5.00	0.220	2 - 9	1091
Positive control^b	20	0.750**	8 - 28	813