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🧪 Cyclopentasiloxane

D5 Silicone | INCI: Cyclopentasiloxane | CAS: 541-02-6

INCI Information

INCI Name
Cyclopentasiloxane
Common Name
D5 Silicone
CAS Number
541-02-6
Category
Silicone / Volatile
Molecular Formula
C₁₀H₃₀OSi₅
Molecular Weight
370.77 g/mol
Appearance
Clear, colorless, volatile liquid
Solubility
Insoluble in water, miscible with silicones and oils
Typical Concentration
1% – 50%
pH Range
Not applicable (inert)
Functions:
Volatile carrierSpreadability enhancerShine agent
Available Purity Grades:
  • 99.0%
  • 99.5% (Cosmetic)
  • 99.8% (High purity)

💰 Indicative Price Range (Bulk)

Typical B2B pricing across verified suppliers
$6 – $20 $/kg
Prices vary by purity, MOQ, and order volume. Always request formal quotes.

📖 About Cyclopentasiloxane

Cyclopentasiloxane (D5) is a volatile silicone that evaporates from skin after application, leaving no residue. It's the secret behind the 'dry oil' feel in serums and sunscreens.

🛒 Purchasing Guide & Tips

❓ Frequently Asked Questions

❓ Is D5 bad for the environment?

It's persistent in the environment and EU is reviewing its safety. Consider Cyclohexasiloxane (D6) as an alternative.

❓ Why use D5 instead of Dimethicone?

D5 evaporates, while Dimethicone stays on skin. Choose based on desired finish.

❓ Is it safe for hair products?

Yes, it's widely used in hair serums and conditioners for shine without weight.

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