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Stearic Acid

Stearic Acid (Stearic Acid), or octadecanoic acid, is a saturated fatty acid with an 18-carbon chain molecular structure. It is widely present in nature, especially in animal and plant fats. This fatty acid exists in the form of a soft waxy solid, with the chemical formula CH3(CH2)16CO2H. The name Stearic Acid is derived from the Greek word "στέαρ," meaning tallow, and its salts and esters are known as stearates. Stearic Acid has a melting point of 69.4 °C and a pKa value of 4.50, making it a common ingredient in food and cosmetic manufacturing.

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Uses in Cosmetics

Stearic Acid has a variety of effects and applications, some of which include:

Moisturizing: Stearic Acid can enhance the skin's moisture retention, making the skin soft and smooth.
Cleansing: As a surfactant, Stearic Acid helps remove dirt and oils from the skin, leaving the skin feeling fresh and clean.
Emulsifying: Stearic Acid helps mix water and oil-based components, ensuring product texture uniformity.
Thickening: It can increase product thickness and fullness, improving product spreadability and extensibility.


Primarily extracted from animal and vegetable fats and oils.
Obtained through the saponification of fats and oils, followed by distillation.
Commercial Stearic Acid is often a blend of Stearic and Palmitic acids, though pure Stearic Acid is available. Some Stearic Acid is produced by hydrogenating palm oil and soy oil

Globally Harmonized System of Classification and Labelling of Chemicals 

Stearic Acid is considered safe for skin use, widely utilized in personal care products. 


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