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


CAS Number 8050-81-5
Chem/IUPAC Name: Silica, hydrated, compounds with poly(dimethylsiloxane)
COSING REF No: 78955
Simethicone is a widely used ingredient in cosmetics due to its ability to improve the texture and feel of products. It is primarily utilized as an anti-foaming agent and emollient. Simethicone helps prevent the formation of unwanted bubbles and foam in cosmetic formulations, leading to a smoother and more consistent appearance. This ingredient appears as a clear and viscous liquid, often used in skin care, hair care, and makeup products to enhance their application and sensory experience. Its versatile nature makes it an essential component in achieving desirable cosmetic product qualities. The chemical formula of Simethicone is C6H18O4Si3.

What is SIMETHICONE used for?

Simethicone finds a versatile range of applications in the cosmetics industry, owing to its unique properties that enhance product performance and user experience.
  • Hair care: In hair care products like shampoos and conditioners, simethicone acts as a detangling agent, smoothing the hair cuticles and reducing static and frizz. Its emollient nature adds a soft and silky texture to hair, making it more manageable and promoting a healthier appearance
  • Cosmetic products: It is a valuable addition to makeup products, foundations, and primers. Its role as an anti-foaming agent helps prevent the undesirable formation of bubbles and uneven textures, contributing to a flawless application. It also aids in creating a smooth, matte finish, enhancing the overall aesthetic of cosmetics
  • Skin care: Its emollient properties make it beneficial in skin care products like moisturizers, lotions, and serums. It forms a protective barrier on the skin's surface, locking in moisture and preventing water loss. This not only hydrates the skin but also imparts a velvety texture, leaving the skin feeling soft and supple


Simethicone is typically synthesized through a process known as emulsion polymerization. This involves the polymerization of dimethylsiloxane and silica in the presence of a catalyst. The resulting polymer is then purified and processed into the clear and viscous liquid form used in cosmetics.

What does SIMETHICONE do in a formulation?

  • Antifoaming
  • Emollient
  • Hair conditioning
  • Skin conditioning

Safety profile

Simethicone is a safe and non-toxic ingredient for both hair and skin. It rarely causes allergic reactions when used in cosmetic and personal care products within recommended concentrations. In any case, patch testing is necessary when using it for the first time. Excessive use could potentially lead to clogged pores, so using products containing simethicone in moderation is recommended.

Technical profile

Property Values
Boiling Point 155-220°C
Melting Point -35°C
pH Neutral
Solubility Insoluble in water
Viscosity High

Commercial Selection : Grades containing solely SIMETHICONE

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