Humectant
Humectant
Humectant (pronounced: hyoo-MEK-tuhnt) is a substance often used in skin care products and food to retain moisture.
Etymology
The term "humectant" originates from the Latin word "humectare," which means to moisten.
Definition
A Humectant is a hygroscopic substance used to keep things moist. It is often a molecule with several hydrophilic groups, most often hydroxyl groups, but amines and carboxyl groups, sometimes esterified, can also be encountered. Their affinity for water molecules promotes hydration and moisture retention.
Usage
Humectants are used in a variety of products, including cosmetics, foods, and medicines. In cosmetics, they are used to prevent the drying out of products, keeping the skin or hair moist by drawing water from the air. In foods, they are used to keep products moist, prevent drying out, and extend shelf life. In medicine, they are used in formulating ointments and creams to keep them from drying out and to help them spread more easily.
Related Terms
- Hygroscopic: A property of attracting and holding water molecules from the surrounding environment.
- Hydration: The process of causing something to absorb water.
- Moisture: The presence of a liquid, especially water, often in trace amounts.
See Also
External links
- Medical encyclopedia article on Humectant
- Wikipedia's article - Humectant
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