Stearic Acid
A versatile fatty acid used as an emulsifier, thickener, and stabilizer in cosmetic formulations, providing texture, stability, and skin-softening benefits.
Stearic Acid is a naturally occurring saturated fatty acid commonly derived from vegetable oils, such as palm oil or shea butter. It is widely used in the cosmetic and personal care industry as an emulsifier, thickener, and stabilizer in creams, lotions, shampoos, and other personal care products.
In emulsions, Stearic Acid helps to stabilize the oil and water phases, preventing separation and ensuring a smooth, consistent texture. It also contributes to the creaminess and richness of products, enhancing spreadability and providing a pleasant skin feel. Additionally, Stearic Acid has mild skin-softening and moisturizing properties, helping to improve the skin’s texture and hydration.
Because of its versatility, Stearic Acid is used in a wide range of cosmetic formulations, from facial creams and body lotions to soaps and hair care products.
FEATURES
- Emulsifier – stabilizes oil and water mixtures, preventing separation.
- Thickener – increases the viscosity of formulations, contributing to a rich, creamy texture.
- Skin-softening – helps to moisturize and smooth the skin, enhancing the product’s feel.
- Versatile – suitable for use in a wide range of personal care products, from lotions to soaps to hair care products.
- Non-irritating – gentle on the skin and suitable for most skin types.
BEST FOR
- Facial creams
- Body lotions
- Shampoos and conditioners
- Soaps and cleansers
- Hair pomades
- Body butters
FORMULATION GUIDELINES
| INCI | Stearic Acid |
|---|---|
| Type | Saturated fatty acid, emulsifier, thickener |
| Solubility | Oil-soluble |
| Use Rate | 1.0–5.0% typical, can be adjusted based on desired thickness and texture. |
| Best Phase | Oil phase (melt before adding to emulsions) |
| pH Compatibility | Works well in formulations with a pH range of 4.5–7.0. |
| Temperature Tolerance | Melts at around 56–58°C; avoid excessive heating during formulation to preserve its properties. |
| Pro Tip | For best results, combine Stearic Acid with other fatty acids, like cetyl alcohol, for improved texture and emulsion stability. If using in anhydrous systems like balms, adjust the ratio of stearic acid to achieve the desired consistency. |
| Appearance | White, waxy solid or flakes |
| Stability Notes | Stable under normal formulation conditions, but store in a cool, dry place to prevent oxidation over time. |
| Storage | Store in a cool, dry place, away from light and moisture, in an airtight container. |
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