Table 3. Comparing the local anaesthetic properties of 2-heptanone with the other ketones.

Substance3.41 mg/mL	IT50	IT0	n
2-heptanone	39.14±4.84	221.88±7.32a	12
3-heptanone	40.82±1.67	258.00±11.47b	6
4-heptanone	45.24±0.44	283.57±16.89b	8
2-hexanone	74.42±0.79	401.00±33.20	7
2-octanone	81.45±1.58	555.00±75.00	4
3-octanone	117.10±0.53	722.50±95.66	6
2-pentanone	390.60±0.10	No measurable	6
3-pentanone	230.30±1.29	765.00±86.60	4

^a,bSignificant difference (p<0.05) for the IT₀ comparison between 2-heptanone, 3-heptanone and 4-heptanone.