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Stearyl Stearate is a wax ester formed by combining stearyl alcohol and stearic acid. It's a versatile, non-greasy emollient widely used in cosmetics and personal care products. Its primary function is to create a silky, smooth feel on the skin, forming a protective barrier to reduce moisture loss. It also acts as a thickener and stabilizer in formulations. You'll find it in lotions, creams, sunscreens, and makeup to enhance texture and provide long-lasting hydration without a heavy residue. It is valued for its ability to improve product spreadability and stability.
Items | Specifications | Results |
Appearance | Conform | |
Odor | A few characteristic odors | Conform |
melting point | 58~62℃ | 60.2℃ |
acid value mgKOH/g | ＜3.0 | 0.62 |
saponification value mgKOH/g | 90~110 | 102.96 |
Conclusion | The product complies with the enterprise standards. | |
Stearyl Stearate is a synthetic ester derived from two fatty acid components: Stearyl Alcohol (a fatty alcohol) and Stearic Acid (a fatty acid). In simple terms, it is created by combining these two ingredients. It is classified as a non-ionic emollient and is a solid wax-like substance at room temperature.
Its chemical structure gives it a unique set of properties that are highly valued in cosmetics and personal care products:
Exceptional Emollient: It acts as a superb skin-softening agent. It forms a protective, breathable barrier on the skin's surface, preventing water loss and leaving skin feeling smooth, supple, and silky—without a greasy or heavy feel.
Thickening Agent & Stabilizer: It helps to increase the viscosity (thickness) of formulations, providing them with more body and a richer texture. It also contributes to the stability of emulsions (mixtures of oil and water), preventing them from separating.
Opacifying Agent: It can give lotions and creams a pearlescent or opaque, creamy appearance, which is often associated with luxury and richness.
Non-Comedogenic: Despite being a wax ester, it is generally considered to have a low likelihood of clogging pores, making it suitable for many skin types.
Stearyl Stearate is a versatile ingredient found in a wide array of products, including:
Moisturizers and Lotions
Creams (face, hand, body)
Sunscreens
Makeup (foundations, lipsticks)
Hair conditioners and styling products
Decorative cosmetics
Formulators use it because it significantly improves the sensorial experience of a product. It transforms the texture, making it feel more luxurious and elegant upon application. It delivers intense moisturization and smoothness without the negative, heavy residue associated with some other oils and butters.
| Feature | Description |
|---|---|
| Chemical Identity | An ester of Stearyl Alcohol and Stearic Acid. |
| Primary Role | Emollient (skin-softener) and texture enhancer. |
| Feel on Skin | Rich, silky, and non-greasy. |
| Key Benefit | Provides excellent moisturization and improves product spreadability and stability. |
| Common In | Lotions, creams, sunscreens, makeup, and hair conditioners. |
In summary, Stearyl Stearate is a high-performance wax ester used extensively in cosmetics to create a luxurious, silky feel, provide long-lasting moisture, and improve the overall texture and stability of the formulation.
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