The ECO formulation was prepared by dispersing 1.2% w/w Carbopol C934P and 2.4% w/w Pluronic® F127 in water under vigorous stirring until complete homogenization occurred. Then, the pH was adjusted to 7 using TEA. Afterward, COR was slowly added until it reached 20% w/w, and the system was continuously stirred for 30 min (Scheme 1). After manufacturing, the emulgel (called ECO, a gel containing COR) was stored at room temperature. The details of the optimization and preparation have recently been published [12 (link)].
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