Table 1.

Summary of the solubility study results.

Solvents	Solubility (mg/mL) ± SD
Methanol	0.4 ± 0.02
Ethanol	19 ± 2.6
Ethanol:water (1:1)	0.42 ± 0.06
Methanol:water (1:1)	0.34 ± 0.03
Propylene glycol	9.7 ± 0.16
PBS pH 7.4	0.66 ± 0.01
Ethanol:PBS pH 7.4 (1:1)	0.79 ± 0.03
Polyethylene glycol	2.9 ± 0.2

The values represent the concentration of TQ ± SD (N = 3) in mg/mL at 48 h.