Skincare Ingredient
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Cyclopentasiloxane
In Skincare: Is Cyclopentasiloxane Safe? Comedogenic Rating & Side Effects
Safety Information
Quick Insights
At a glance
- 01
Cyclopentasiloxane improves the smooth application and luxurious feel of cosmetic formulations.
- 02
This silicone ingredient helps ensure even distribution of other ingredients within a product’s formula.
- 03
Cyclopentasiloxane evaporates rapidly from the skin's surface, leaving behind a light feel.
- 04
Cyclopentasiloxane is frequently utilized in various skin and hair care products.
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This ingredient demonstrates compatibility with other organic molecular ingredients commonly found in cosmetics.
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Cyclopentasiloxane acts as a solvent, facilitating the dissolution and delivery of other ingredients to the skin.
Key Benefits
What Cyclopentasiloxane does for your skin
Overview
Ingredient Profile
Data & Research
Scientific Facts
Common Uses
Formulation in Cyclopentasiloxane
Role of Cyclopentasiloxane
Active Cosmetic Mechanisms
HAIR CONDITIONING
Hair SoftenerImproves hair manageability, softness, and appearance
SCIENTIFIC ANALYSIS
// Evidence: Hair conditioning ingredients smooth the cuticle, reduce frizz, and add shine through cationic surfactants (behentrimonium chloride), silicones (dimethicone, amodimethicone), natural oils, and proteins. These deposit on negatively charged damaged sites, neutralizing charge, filling surface irregularities, and providing lubrication. Mechanism involves electrostatic attraction, film formation, and surface smoothing.
SKIN CONDITIONING
Skin EnhancerMaintains skin in good condition and improves its feel
SCIENTIFIC ANALYSIS
// Evidence: Skin conditioning ingredients enhance appearance, texture, and health of skin through various mechanisms. This broad category encompasses emollients, humectants, occlusives, and other agents that improve skin feel, appearance, and function. May work by moisturizing, smoothing, softening, or protecting skin. Effects include improved tactile properties, enhanced barrier function, and better overall skin condition.
SKIN CONDITIONING - EMOLLIENT
Skin SoftenerSoftens and smooths skin by filling gaps between cells
SCIENTIFIC ANALYSIS
// Evidence: Emollient ingredients create smooth, soft skin by filling spaces between corneocytes in stratum corneum. These include esters (isopropyl palmitate), oils (jojoba, argan), fatty alcohols, and silicones. The mechanism involves spreading on skin surface, filling microscopic irregularities, and creating lubricious film. Effects are immediate tactile improvement and visual smoothing. Emolliency measured by spreading coefficient and skin feel assessments.
SOLVENT
Ingredient DissolverDissolves other ingredients to create uniform formulations
SCIENTIFIC ANALYSIS
// Evidence: Solvents dissolve, dilute, or disperse other ingredients creating homogeneous solutions. Water is universal solvent for hydrophilic ingredients. Organic solvents include ethanol (dissolves fragrances, some actives), propylene glycol, and glycerin. Selection based on polarity matching between solvent and solute. Mechanism involves disrupting intermolecular forces in solute and surrounding with solvent molecules. Critical for maintaining ingredient solubility and product stability.
Products
containing Cyclopentasiloxane
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References
Scientific sources
CosmeticsInfo.org, Accessed May 2021, ePublication
Regulatory Toxicology and Pharmacology, February 2016, pages S67-S76
Environmental International, November 2015, pages 55-63
International Journal of Toxicology, December 2011, pages 149-227
Similar Ingredients
Ingredients with similar chemical profiles and skincare properties.
Frequently Asked Questions
Cyclopentasiloxane — common questions
What is Cyclopentasiloxane in skincare?
Cyclopentasiloxane (D5) is a cyclic dimethyl polysiloxane. It’s part of a family of silicone ingredients including cyclotetrasiloxane (D4), cyclohexasiloxane (D6), and cyclomethicone – which is a blend of cyclic dimethyl polysiloxanes with varying chain lengths.
What does Cyclopentasiloxane do? / Functions of Cyclopentasiloxane?
Common functions: HAIR CONDITIONING, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SOLVENT.
What is the comedogenic rating of Cyclopentasiloxane? / Is Cyclopentasiloxane comedogenic?
Cyclopentasiloxane has a comedogenic rating of 1 out of 5. A rating of 1 means it is unlikely to clog pores.
Does it clog pores?
Cyclopentasiloxane is unlikely to clog pores (rating 1/5).
Is Cyclopentasiloxane safe for skin?
Cyclopentasiloxane has a safety rating of 2 out of 5. A rating of 2 means it is generally considered safe for most skin types. Note: Volatile silicone—main concerns are inhalation in sprays and environmental persistence/bioaccumulation (EWG) rather than skin toxicity. Limited safety data is available on long-term environmental impa
Is Cyclopentasiloxane good for sensitive skin?
Cyclopentasiloxane has an irritancy rating of 1 out of 5. A rating of 1 means it is generally well-tolerated.
What are the side effects of Cyclopentasiloxane in skincare?
Known considerations: Volatile silicone—main concerns are inhalation in sprays and environmental persistence/bioaccumulation (EWG) rather than skin toxicity. Limited safety data is available on long-term environmental impact, though it is considered safe for topical use in cosmetics by the Cosmetic Ingredient Review (CIR) when used at current concentrations.