Cyclopentasiloxane (D5)
Cyclopentasiloxane chemical properties
CAS Number:
541-02-6
Other Chemical Name:
Formula:
(C2H6OSi)5
Boiling point:
210 °C (410°F)
Flash Point
73°C (95°F)
Density:
Viscosity：
Physical State:
Description of cyclopentasiloxane
Cyclopentasiloxane, often referred to as D5, is a clear, odorless, and lightweight silicone-based compound widely used in the cosmetics and personal care industry. It belongs to a larger class of silicones known as cyclomethicones. D5 is valued for its unique properties that make it an excellent ingredient in various formulations.
Application of cyclopentasiloxane
Cyclopentasiloxane (D5) has numerous applications in the personal care and cosmetics industry, primarily due to its unique properties:
Cyclopentasiloxane for hair care
Cyclopentasiloxane is widely used in the formulation of conditioners, shampoos, styling products, etc. It adds shine, softness, and manageability to hair by reducing friction and preventing tangles. It also helps to seal the hair cuticle, protecting it from damage. When used in styling products, D5 helps to control frizz, add volume, and provide heat protection for hair during styling.
Cyclopentasiloxane in skin care
Moisturizers and Lotions: D5 acts as an emollient, providing a smooth and silky feel to the skin, while also helping to spread and deliver other active ingredients.
Sunscreens: Due to its water-resistant properties, D5 helps create a barrier on the skin, enhancing the effectiveness of sunscreen formulations.
Anti-aging Products: It can improve the texture and appearance of the skin, reducing the appearance of fine lines and wrinkles.
Decamethylcyclopentasiloxane (D5) is an excellent solvent for a wide range of ingredients commonly used in cosmetics and personal care products. D5 can dissolve various active ingredients, including vitamins, botanical extracts, and other performance-enhancing agents, ensuring they are evenly distributed throughout the formulation.
The following table summarize the benefits of Cyclopentasiloxane's properties in personal care and cosmetics application.
| Sensory Enhancement | Functional Benefits | Formulation Benefits | Specific Applications |
|---|---|---|---|
| - Silky, Smooth Feel - Non-Greasy and Non-Sticky | - Spreadability - Delivery System - Water Resistance - Hair Detangling and Frizz Control | - Non-Comedogenic - Compatibility - Versatility | - Skincare: Moisturizers, lotions, creams, sunscreens, anti-aging products - Haircare: Conditioners, shampoos, styling products - Makeup: Foundations, primers, powders - Deodorants and Antiperspirants - Bath and Shower Products - Shaving Products - Fragrances |
Cyclopentasiloxane (D5) is also a crucial building block for production of various silicone product. Its cyclic structure and reactive nature allow it to undergo ring-opening polymerization, forming linear silicone polymers with diverse properties.
Cyclopentasiloxane finds application as a VOC exempt solvent in various industries. Despite being a volatile organic compound, D5 is exempt from VOC regulations in many regions due to its low ozone-depleting potential and minimal contribution to smog formation.
Cyclopentasiloxane regulation
The following table summarize the regulation of cyclopentasiloxane in different countries and states.
| US | California | Canada | EU | UK | Australia | |
|---|---|---|---|---|---|---|
| Environmental Regulation | The EPA does not currently classify cyclopentasiloxane (D5) as a volatile organic compound (VOC) for regulatory purposes under the Clean Air Act. | Cyclopentasiloxane (D5) is exempt from CARB's VOC regulations. | Cyclopentasiloxane (D5) is listed as a toxic substance under CEPA. | - REACH: D5 has been identified as a SVHC due to D5's PBT properties - Cosmetic Products Regulation: D5 is restricted to a maximum concentration of 0.1% in rinse-off cosmetic products. A draft amendment has been published to extend this restriction to all cosmetic products, including leave-on products (e.g., creams, lotions). | - UK REACH: Under the UK's version of the REACH regulation, D5 is currently under consideration for restrictions similar to those in the EU. The UK's Health and Safety Executive (HSE) launched a call for evidence in March 2023 to gather information on the use and potential risks of cyclosiloxanes, including D5. | - D5 is listed on the Australian Inventory of Chemical Substances (AICS), which means it is allowed for use in industrial and consumer products. - NICNAS has conducted a risk assessment of D5 and identified it as a potential risk to the environment due to its persistence and bioaccumulative properties. |
| Health Regulation | - The FDA does not impose specific concentration limits - The CIR has reviewed D5 and concluded it is safe for use in cosmetics at current concentrations and practices | - D5 is not currently listed under California's Proposition 65. - Cyclopentasiloxane is not currently listed as a priority product under the SCP at DTSC | Health Canada allows the use of D5 in cosmetics, but it is included in the Cosmetic Ingredient Hotlist |
Product Equivalent
- Shin-Etsu: KF-995
- MOMENTIVE: SF1202
- ESQUIM: FM-415
- DOWS: XIAMETER PMX-0245, DOWSIL 245 Fluid
- BRB: CM 50
Synonyms:
Need more information?
Our expert would like to speak with you about your project. Feel free to reach us using the below details.