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Cyclopentasiloxane (D5 Silicone) is a widely used silicone ingredient that enhances the feel, application, and longevity of skincare, haircare, and cosmetic products.
Cyclopentasiloxane (D5 Silicone) provides a lightweight, silky texture, making it ideal for fast-drying and non-greasy formulations.
Cyclopentasiloxane (D5 Silicone) is not a single chemical — it refers to a group of cyclic silicone compounds, specifically cyclic siloxanes, typically composed of repeating [–Si(CH₃)₂–O–] units arranged in a ring.
CAS: 541-02-6
MF: C10H30O5Si5
MW: 370.77
EINECS: 208-764-9
Synonyms
2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane;cyclicdimethylsiloxanepentamer;Cyclopentasiloxane, decamethyl-;D3770;Decamethylcylopentasiloxane;siliconsf1202;unioncarbide7158siliconefluid;vs7158
Cyclopentasiloxane (D5 Silicone) is a synthetic silicone oil that is widely used in cosmetics and hair care, skin care products.
Cyclopentasiloxane (D5 Silicone) is volatile and is often added to serums, lotions, foundations, primer and conditioners to provide a soft silky touch and improve spreading properties.
Cyclopentasiloxane (D5 Silicone) is a type of silicone-based compound belonging to the cyclomethicone family.
Cyclopentasiloxane (D5 Silicone) is a clear, odorless, lightweight liquid with a low viscosity and fast evaporation rate.
Cyclopentasiloxane (D5 Silicone) is a widely used silicone ingredient that enhances the feel, application, and longevity of skincare, haircare, and cosmetic products.
Cyclopentasiloxane (D5 Silicone) provides a lightweight, silky texture, making it ideal for fast-drying and non-greasy formulations.
Cyclopentasiloxane (D5 Silicone) is a cyclic siloxane, that has a silicon-oxygen bond in a cyclic arrangement and methyl groups attached with the silicon atom.
Cyclopentasiloxane (D5 Silicone) is used in the production of some silicon-based polymers that are widely used in various personal care products.
Pharmaceutical secondary standards for application in quality control, provide pharma laboratories and manufacturers with a convenient and cost-effective alternative to the preparation of in-house working standards.
Cyclopentasiloxane (D5 Silicone) is a staple ingredient used in cosmetics.
The chemical formula for Cyclopentasiloxane (D5 Silicone) is C10H30O5Si5.
Cyclopentasiloxane (D5 Silicone) is a non-greasy silicone that is colorless, odorless, and water-thin.
Cyclopentasiloxane (D5 Silicone) gets quickly evaporated from the skin rather than getting absorbed - making it a brilliant ingredient to be used in products that need to dry fast, like antiperspirants and hair sprays.
Further, Cyclopentasiloxane (D5 Silicone) also has lubricating properties and feels silky smooth when applied to hair and skin.
Cyclopentasiloxane (D5 Silicone), also known as D5 and D5, is an organosilicon compound with the formula [(CH3)2SiO]5.
Cyclopentasiloxane (D5 Silicone) is a colorless and odorless liquid that is slightly volatile.
Cyclopentasiloxane (D5 Silicone) is used in various cosmetic products.
Cyclopentasiloxane (D5 Silicone) also is used as a dry cleaning solvent and has been marketed as an "eco-friendly" and "green" alternative to perchloroethylene in the 2000s, under the tradename GreenEarth.
Cyclopentasiloxane (D5 Silicone) is persistent in nature and bioaccumulative. Cyclopentasiloxane (D5 Silicone) is acutely non-toxic but its long-term health effects are unknown.
Cyclopentasiloxane (D5 Silicone), otherwise known as decamethylcyclopentasiloxane or D5 Cyclopentasiloxane, is a type of silicone commonly used in pharmaceutical manufacturing.
As an excipient, Cyclopentasiloxane (D5 Silicone) is often used as a carrier or solvent for active ingredients or therapeutic agents, and can also be used to enhance the delivery of various pharmaceuticals.
Cyclopentasiloxane (D5 Silicone) provides a non-greasy, smooth feel and helps to improve spreadability and absorption of topical formulations.
Cyclopentasiloxane (D5 Silicone) also finds use as a stabilizing agent.
Cyclopentasiloxane (D5 Silicone) is an organosilicon compound with the formula [(CH3)2SiO]5. Cyclopentasiloxane (D5 Silicone) is a colorless and odorless liquid that is slightly volatile.
Cyclopentasiloxane (D5 Silicone) is classified as a cyclomethicone.
Such fluids are commonly used in cosmetics, such as deodorants, sunblocks, hair sprays and skin care products.
Cyclopentasiloxane (D5 Silicone) is becoming more common in hair conditioners, as it makes the hair easier to brush without breakage.
Cyclopentasiloxane (D5 Silicone) is also used as part of silicone based personal lubricants.
Cyclopentasiloxane (D5 Silicone) is considered an emollient.
In Canada, among the volume used in consumer products approximately 70% were for antiperspirants and 20% for hair care products.
Cyclopentasiloxane (D5 Silicone) Chemical Properties
Melting point: -44°C
Boiling point: 90 °C/10 mmHg (lit.)
Density: 0.958 g/mL at 25 °C (lit.)
Vapor pressure: 33.2Pa at 25℃
Refractive index: n20/D 1.396(lit.)
Fp: 162 °F
Storage temp.: 2-8°C
Solubility: <0.0001g/l (calculated)
Form: Liquid
Color : Colorless
Specific Gravity: 0.959
Explosive limit: 0.52-7%(V)
Water Solubility: Immiscible with water.
Hydrolytic Sensitivity 1: no significant reaction with aqueous systems
Merck: 14,2848
BRN: 1800166
Dielectric constant: 2.5（20℃）
Stability: Stable. Incompatible with strong oxidizing agents.
InChIKey: XMSXQFUHVRWGNA-UHFFFAOYSA-N
LogP: 8.07 at 24.6℃
Surface tension: 18.29 mN/m at 297.15K
CAS DataBase Reference: 541-02-6(CAS DataBase Reference)
NIST Chemistry Reference: Cyclopentasiloxane (D5 Silicone)(541-02-6)
EPA Substance Registry System: Cyclopentasiloxane (D5 Silicone)(541-02-6)
Uses
A cyclic volatile methylsiloxane (cVMS) used in cosmetic and personal care products.
Used in dermal exposure and inhalation toxicity study.
Cyclopentasiloxane (D5 Silicone) is incorporated into a formulation for its emollient and solvent activity.
Octamethylcyclotetrasiloxane and Cyclopentasiloxane (D5 Silicone) are major industrial products, which are either marketed as such or used for the production of polydimethylsiloxanes.
Intermediate in the manufacture of high mol wt siloxane polymers.
Carrier ingredient in personal care products; dry cleaning solvent.
Cyclopentasiloxane (D5 Silicone) is classified as a cyclomethicone.
Such fluids are commonly used in cosmetics, such as deodorants, sunblocks, hair sprays and skin care products.
Cyclopentasiloxane (D5 Silicone) is becoming more common in hair conditioners, as it makes the hair easier to brush without breakage.
Cyclopentasiloxane (D5 Silicone) is also used as part of silicone-based personal lubricants.
Cyclopentasiloxane (D5 Silicone) is considered an emollient.
In Canada, among the volume used in consumer products approximately 70% were for antiperspirants and 20% for hair care products.
10,000–100,000 tonnes per year of Cyclopentasiloxane (D5 Silicone) is manufactured and/or imported in the European Economic Area.
Atmospheric emissions of Cyclopentasiloxane (D5 Silicone) in the Northern Hemisphere were estimated to 30,000 tonnes per year.
Cyclopentasiloxane (D5 Silicone) is also used as a dry-cleaning solvent.
Cyclopentasiloxane (D5 Silicone) was first marketed by GreenEarth Cleaning in the 1990s and was claimed to be eco-friendlier than tetrachloroethylene (the most common dry-cleaning solvent worldwide since the 1950s) despite being controlled in the EU for to its persistent, bioaccumulative and toxic characteristics.
Cyclopentasiloxane (D5 Silicone) is more bioaccumulative than tetrachloroethylene and it does not break down in nature.
Cyclopentasiloxane (D5 Silicone)'s use in dry cleaning will be prohibited in the European Union after June 2026 due to its environmental effect.
