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Table 1 Mutagenic Index (MI) for 10 aprotic ionic liquids as determined from the Ames test screening as reported by Docherty et al. [53]

From: Assessing the mutagenicity of protic ionic liquids using the mini Ames test

Ionic liquid

MI (TA98)

MI (TA98 + S9)

MI (TA100)

MI (TA100 + S9)

1-Butyl-3-methylimidazolium bromide

0.86 ± 0.18

0.88 ± 0.20

1.15 ± 0.17

0.88 ± 0.15

1-Hexyl-3-methylimidazolium bromide

0.99 ± 0.37

0.84 ± 0.10

0.92 ± 0.05

1.21 ± 0.23

1-Octyl-3-methylimidazolium bromide

1.55 ± 0.28

0.85 ± 0.24

1.09 ± 0.13

1.13 ± 0.10

1-Butyl-3-methyl pyridinium bromide

1.07 ± 0.10

0.93 ± 0.13

1.39 ± 0.30

1.34 ± 0.04

1-Hexyl-3-methyl pyridinium bromide

1.16 ± 0.34

1.09 ± 0.13

1.27 ± 0.18

1.08 ± 0.19

1-Octyl-3-methyl pyridinium bromide

1.27 ± 0.42

1.01 ± 0.11

1.34 ± 0.28

0.89 ± 0.01

Tetramethylammonium bromide

1.47 ± 0.26

0.90 ± 0.07

1.07 ± 0.13

1.16 ± 0.25

Tetraethylammonium bromide

1.33 ± 0.28

1.74 ± 0.29

1.04 ± 0.03

1.26 ± 0.07

Tetrabutylammonium bromide

1.07 ± 0.21

1.14 ± 0.35

1.19 ± 0.06

1.19 ± 0.02

Tetrahexylammonium bromide

1.21 ± 0.80

0.70 ± 0.18

1.09 ± 0.08

0.82 ± 0.09

  1. The results are from concentrations of 1 mg/plate, aside from Tetrahexylammonium bromide which was tested at 0.01 mg/plate as higher concentrations were toxic to the bacterial strains