This water-like liquid is synthetically manufactured but is derived from naturally occurring oxygen and silicones. It encompasses within itself the family of cyclic dimethyl siloxanes.

INCI name-Cyclopentasiloxane

Molecular formula- C₁₀H₃₀O₅Si₅

Alternate names-Cyclopolydimethylsiloxane, Dimethylcyclopolysiloxane, Polydimethyl siloxy cyclics.

 BENEFITS AND USES-

• It is preferred for its conditioning, viscosity controlling, and water-repelling properties. It is an excellent solvent and can be found in countless products.
• It is documented to be an anti-static agent, non-greasy, non-sticky, and is acclaimed for giving a slippery feel and a dry non-cooling sensation on evaporation.
• It evaporates quickly and does not leave behind any residue. This commands application in formulating deodorants and antiperspirants.
• It makes spreading products a breeze because of its unique fluidity.
• It provides stability to the formulation and prevents it from splitting.
• It is used to deposit active ingredients on the skin and hair, thereby enhancing the efficacy of the formulation.
• It is used in serums, lotions, hair sprays, face and body mists, sunscreens, non-sticky oils, etc.

HOW IT WORKS-

• It works by carrying the key ingredients of a formulation into the skin and hair for better absorption.
• Lacking penetrative powers, it simply forms a layer over the skin.
• It makes the surface slippery and then evaporates owing to its volatility.

 CONCENTRATION AND SOLUBILITY-

• It is insoluble in water and is soluble in alcohols, silicones, and solvents.
• It is suggested that its concentration be kept between 3%-10% for deodorants and skin care products, though it can be increased up to 20%.

 HOW TO USE-

• Heat oil phase up to 80^o
• Add it to the heated phase.
• Cover the vessel to prevent loss of ingredients due to evaporation.
• Wait until it dissolves and proceed with emulsification.