Primosil™ CS (Cyclopentasiloxane)

Primosil™ CS (Cyclopentasiloxane) is a popular silicone fluid in personal care and cosmetics, valued for its lightweight, non-greasy texture. It gives a silky, smooth feel to the skin, enhancing lotions, serums, and makeup foundations. It evaporates quickly, leaving a soft, velvety finish without residue, ideal for formulations requiring a clean, non-oily feel. Additionally, it aids in the even spread of cosmetic ingredients, improving product performance and consistency. In hair care, it adds shine, reduces frizz, and makes hair more manageable while its barrier properties protect skin and hair from moisture loss.

In stock
Need Assistance?
Technical Specifications
PrimosilTM CS (Cyclopentasiloxane)
INCI
Cyclopentasiloxane
CAS Number
541-02-6
Purity
99%
Molecular Formula
C10H30O5Si5
Molecular Weight
370.77 g/mol
Solubility
Soluble in water.
pH
7-9
Shelf Life
24-months from the date of manufacturing.
Boiling Point
210°C
Melting Point
-38°C
Storage
Store in a cool, dry, and well-ventilated area away from sources of heat, open flames, and direct sunlight.
Key Benefits
PrimosilTM CS (Cyclopentasiloxane)
Volatile Silicone
Offers a non-greasy feel due to its volatility, evaporating quickly from the skin without leaving a residue. Ideal for lightweight formulations.
Silky Texture
Provides a silky, smooth texture to creams, lotions, and serums, enhancing the sensory experience of the final product.
Emollient Properties
Acts as an effective emollient, softening and smoothing the skin surface, making it suitable for various skincare products.
Improved Spreadability
Enhances the spreadability of formulations, ensuring an even application and contributing to the product's ease of use.
Quick Drying
Dries quickly on the skin or hair, making it an excellent choice for products where a fast-drying effect is desired, such as sprays and serums.
Non-Comedogenic
Does not clog pores, making it an excellent ingredient for products aimed at sensitive or acne-prone skin.
Compatible with Actives
Works well with a wide range of active ingredients, allowing formulators to create versatile and effective skincare and cosmetic products.
Film-Forming Ability
Forms a light, breathable film on the skin or hair, enhancing protection while providing a smooth finish without a heavy feel.
Enhanced Slip
Improves the slip of formulations, making it easier to apply products like foundations and sunscreens without dragging or pulling the skin.
Stabilizes Emulsions
Helps stabilize emulsions, aiding in the uniform mixing of water and oil phases, crucial for achieving a smooth and homogenous product texture.

Frequently Asked Questions (FAQ)

What is Primosil™ CS (Cyclopentasiloxane), and how is it commonly used in cosmetic formulations?

It is a lightweight, volatile silicone compound often used in cosmetics for its ability to enhance product spreadability, impart a silky, non-greasy feel, and temporarily fill in fine lines.