The material selection platform
Cosmetics Ingredients
The material selection platform
Cosmetics Ingredients


CAS Number 8007-43-0
Chem/IUPAC Name: Sorbitan, (Z)-9-octadecenoate (2:3)
EINECS/ELINCS No: 232-360-1
COSING REF No: 38185
Sorbitan Sesquioleate in cosmetics is an emulsifying agent and surfactant used to stabilize oil-in-water emulsions. It is also referred to by its other names such as Span 83. Sorbitan Sesquioleate is responsible for blending water and oil-based ingredients in skincare and makeup formulations. It enhances stability and texture, preventing ingredient separation. Sorbitan Sesquioleate is valued for its role in creating smooth and well-textured cosmetic products, contributing to a consistent and desirable user experience in a variety of skincare and beauty applications. The chemical formula of Sorbitan Sesquioleate is C66H130O18.


Sorbitan Sesquioleate, known for its emulsifying prowess, is a versatile ingredient in skincare and cosmetics, contributing to both product texture and performance.
  • Skin care: It functions as a skin-conditioning agent, enhancing the spreadability and texture of products. Its emulsifying properties contribute to the even distribution of ingredients, providing a smoother application. This makes it valuable in formulations like creams and lotions, ensuring a comfortable and well-absorbed experience for users
  • Cosmetic products: It is a key emulsifying agent, fostering the harmonious blending of water and oil-based components. This property is crucial in the formulation of foundations, creams, and other makeup products, ensuring a stable and uniform texture


Sorbitan Sesquioleate is made through the reaction of sorbitol with oleic acid, resulting in an ester. This process, known as esterification, creates a compound with emulsifying properties. While derived from natural sources, the modification distinguishes it from its natural origin, contributing to its effectiveness as an emulsifier in cosmetics.

What does SORBITAN SESQUIOLEATE do in a formulation?

  • Emulsifying
  • Skin conditioning
  • Surfactant

Safety profile

Sorbitan Sesquioleate is generally considered safe for use in cosmetics. It has a low toxicity profile and is well-tolerated by the skin. However, as with any ingredient, individual sensitivities may vary. Therefore, patch testing is recommended, particularly for those with specific skin concerns or allergies.

Technical profile

Property Values
Boiling Point 738.7°C
Melting Point 50-60°C
Solubility Dispersible in water
Viscosity Low
Back to Top