Sodium Stearate

Sodium Stearate (also known as sodium octadecanoate) is a versatile, high-purity white powder widely recognized as the sodium salt of stearic acid. It serves as an essential ingredient in soaps, cosmetics, deodorants, and skincare formulations.

Sodium Stearate is produced via the saponification reaction, where stearic acid reacts with sodium hydroxide to form this anionic surfactant. It appears as a fine white to off-white powder with a slight fatty odor and is soluble in hot water. Its unique structure-featuring a hydrophilic (water-attracting) head and a hydrophobic (oil-attracting) tail-enables it to form micelles, making it highly effective for cleansing and emulsifying.

Commonly considered the most traditional form of soap, Sodium Stearate has been used for centuries in bar soaps and modern formulations alike.

Technical Specifications

Primary Applications of Sodium Stearate

Sodium Stearate excels in multiple industries due to its multifunctional role: 

Soaps and Cleansers: 

Primary component in bar soaps, providing rich lather, hardness, and effective cleansing by removing dirt, oil, and impurities. 

Cosmetics and Skincare: 

Acts as an emulsifier in creams, lotions, moisturizers, and foundations; stabilizes oil-water mixtures for smooth textures. 

Deodorants and Stick Products: 

Gelling agent in solid deodorants, lip balms, and stick sunscreens; provides structure and waterproofing. 

Makeup: 

Viscosity controller and binder in eyeshadows, lipsticks, and powders for better adhesion and longevity. 

Other Applications: 

Stabilizer in pharmaceuticals, thickener in paints/inks, and lubricant in rubber/plastics.

Benefits of Sodium Stearate

Excellent Emulsification:

Blends oil and water phases seamlessly for stable, luxurious formulations.

Cleansing Power:

As a surfactant, it gently lifts grime while creating creamy foam.

Texture Enhancement:

Thickens products, improves spreadability, and hardens solids without synthetic preservatives.

Stability and Longevity:

Prevents separation in emulsions;  contributes to product shelf life.

Natural-Derived Options:

Vegetable-based versions support clean beauty and vegan formulations.

Sodium Stearate enhances sensory experiences, turning everyday products into premium ones with better performance and feel.

Frequently Asked Questions (FAQs)

Q: What is Sodium Stearate made from?

A: Sodium Stearate is the sodium salt of stearic acid, typically derived from vegetable oils like coconut or palm, or animal fats (tallow).

Q: What does Sodium Stearate do in soap?

A: It is the main ingredient responsible for creating hard bar soap, rich lather, and effective cleansing by acting as a surfactant that binds dirt and oil for easy rinsing.

Q: Can Sodium Stearate clog pores?

A: In balanced formulations, no. However, excessive use or high concentrations may leave residue; it's best used with other ingredients for optimal skin compatibility.

Q: What is the difference between Sodium Stearate and Stearic Acid?

A: Stearic Acid is the fatty acid precursor; Sodium Stearate is its sodium salt, which is water-soluble and functions as a soap/surfactant, while Stearic Acid is used as a thickener.

Q: How should Sodium Stearate be stored?

A: Store in a cool, dry place in sealed containers to prevent moisture absorption.

Contact Us

For price, COA, TDS or related products, please contact us at:

Email: mandy@aozunchem.com

WhatsApp: +86-18452425579

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