Stearic Acid (CAS 57-11-4) is a C18 saturated fatty acid — a classic ingredient in soap bars, emulsions and creams. It stabilizes, thickens and contributes the rich lather and body associated with traditional soap and skincare.
Physical & Chemical Properties
- INCI: Stearic Acid
- CAS number: 57-11-4
- Appearance: white waxy solid (flakes or beads)
- Solubility: insoluble in water; soluble in ethanol, oils and melted fats
- Melting point: approx. 69–72°C
- Molecular formula: C18H36O2
- Ionic type: fatty acid (anionic after saponification)
Key Benefits for Formulation
- Soap making: classic bar-soap fatty acid
- Emulsion stability: strengthens cream and lotion structure
- Thickening: builds body and viscosity
- Pearlizing: contributes to pearlescent effects
- Versatile: personal care, candle and industrial use
Main Applications
- Soap bars & syndets: lather and hardness
- Creams & lotions: stability and body
- Makeup: texture and structure
- Suppositories & pharma: base ingredient
- Candles & industrial: hard wax applications
Why Choose Our Bulk Stearic Acid?
- GMP manufacturing: full quality control from raw material to finished product
- Complete documentation: COA, SDS and heavy metal test reports available on request
- Flexible supply: MOQ and lead time on inquiry, from R&D samples to mass production
- Export experience: reliable shipping to EU, North America, Australia and Middle East
Recommended Usage
Typical use level 1%–10% depending on application; soap formulations use higher levels with saponification. Add to the oil phase; heat above melting point during processing.
FAQ About Wholesale Stearic Acid
What is the CAS number of Stearic Acid?
CAS 57-11-4.
What is the INCI name?
Stearic Acid.
What is Stearic Acid used for?
Soap making, emulsion stability and cream texture.
Is it water soluble?
It is insoluble in water and soluble in ethanol and melted oils.
What is the recommended use level?
1%–10% depending on application.
Is it used in soap?
Yes — it is a classic fatty acid for bar soap with rich lather.
What is the melting point?
Approximately 69–72°C.
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