External emulsions should be stored in a refrigerator.

• A. True
• B. Store in a cool dark place
• C. False
• D. It depends on the product

Answer: (C)

Storage conditions for external emulsions depend on the product’s formulation and stability data, not a universal rule. Many external emulsions are stable at room temperature and are simply kept in a cool, dry place away from direct heat and light, as indicated on their label. Refrigeration is only required if the manufacturer specifies it—often to protect heat‑sensitive ingredients or to extend shelf life under certain conditions. Conversely, chilling can sometimes destabilize some emulsions, causing changes in texture or phase separation. So declaring that all external emulsions must be refrigerated is not correct; storage must follow the product-specific instructions.