Michigan Esthetician State Board Practice Exam

What is a sealed vial containing a single application of highly concentrated extracts called?

1. Ampoule

2. Serum

3. Essence

4. Vial

The correct answer is: Ampoule

A sealed vial containing a single application of highly concentrated extracts is referred to as an ampoule. Ampoules are designed to preserve the potency of their contents, often under sterile conditions, and are commonly used in the skincare and cosmetic industry. Their small, sealed packaging ensures that the extract remains uncontaminated until it is ready to be used, which is especially important for active ingredients that may degrade when exposed to air or light. While serums and essences also contain concentrated ingredients, they typically come in larger containers meant for multiple uses rather than single doses. A serum usually functions as a treatment with specific functions, while an essence is a lighter formulation that focuses on hydration and prepping the skin. The term vial generally refers to any small bottle used for storing liquids, without the implication of single-use or high concentration. Therefore, the specific characteristics of ampoules make them the correct answer.