Formulations Centrifugation Test Storage Condition (1 month) 4°C 25°C 45°C F1 √ ✕ √ √ F2 √ ✕ √ ✕ F3 √ √ √ √ F4 √ √ √ √ F5 √ √ ✕ ✕ F6 √ √ ✕ ✕ √ No phase separation; ✕ unstable system with phase separation or creaming.

Table 2: Stability of Palm-Based Esters Nanoemulsion Formulations.