Cyclopentasiloxane

Hair Care Products: Used in conditioners and shine sprays to provide a smooth, non-greasy finish and heat protection.
Skin Care &amp; Makeup: Serves as a base for foundations and sunscreens, ensuring even distribution and a matte finish.
Dry Cleaning: Utilized as an eco-friendlier alternative to traditional solvents for specialized textile cleaning.

D5, Decamethylcyclopentasiloxane.

CAS: 541-02-6
EC: 208-764-9
Sectors: Personal Care & Cosmetics, Automotive

Cyclopentasiloxane (CAS 541-02-6), also known as D5, is a volatile silicone fluid that appears as a colorless, odorless liquid and evaporates without leaving a greasy residue, and it is used as an emollient and solvent in cosmetics and as a lubricant and cleaner for delicate automotive components. In premium cosmetics, it functions as a Technical Grade emollient and solvent, enhancing the sensory profile of creams and foundations. Its low surface tension allows for a smooth application of pigments and other active ingredients. It offers superior thermal stability and water repellency, making it ideal for specialized surface treatment applications.

Typical Properties

Molecular formula	C₁₀H₃₀O₅Si₅
Molecular weight	370.77 g/mol
Appearance	liquid
Form	Liquid
Color	Colorless
Melting point	-38 °C
Boiling point	210 °C
Density	0.9593 g/cm³ @ Temp: 20 °C
Water solubility	Immiscible with water.
Flash point	162 °F
GHS signal word	Warning · Health hazard
HS code	29310095
Grades available	Cosmetic Grade, Technical Grade

Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.

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