CAS Number:
63148-62-9
Chemical / IUPAC Name:
Polydimethylsiloxane (PDMS)
INCI Name:
Dimethicone
EC Number:
613-156-5
Molecular Formula:
(C2H6OSi)n
Other Names:
Silicone oil 10000 cSt, Dimethicone 10000, PDMS 10000, High viscosity silicone fluid
Uses:
Silicone 10000 refers to a high viscosity polydimethylsiloxane (Dimethicone) fluid with a viscosity of approximately 10,000 centistokes . Due to its high molecular weight and thick consistency, it offers enhanced substantivity, long-lasting effects, and a rich, luxurious feel compared to lower viscosity grades. It is chemically inert, thermally stable, and physiologically harmless .
· Cosmetics & Personal Care: Widely used in skin care creams, lotions, sunscreens, and color cosmetics. It imparts a soft, velvety skin feel, improves spreadability, and provides lubricity without being sticky . It forms a non-greasy, protective film which resists water and waterborne irritants, yet allows the skin to breathe .
· Hair Care: Used in shampoos, conditioners, and styling products for its conditioning properties. It adds silky softness to hair, provides frizz control, and improves wet and dry combing .
· Industrial Applications:
· Lubricant: Provides excellent lubrication for most plastic, elastomeric, and metal surfaces .
· Release Agent / Mold Release: Effective in rubber, plastic, and metal die-casting applications .
· Antifoam / Defoamer: Effectively controls foam in various processing operations, especially in non-aqueous systems .
· Damping Fluid: Provides high damping action for mechanical and electrical equipment .
· Dielectric Fluid / Electrical Insulating Fluid: Used as a dielectric coolant and insulating fluid .
· Coatings Additive: Used in automotive, furniture, and specialty polishes to enhance gloss and water repellency
Origin
Silicone 10000 is a synthetic polymer derived from silica (sand/quartz). It is manufactured through a hydrolysis and polymerization process from dimethyldichlorosilane
What does Silicone 10000 do in a formulation?
- Skin Conditioning Agent / Emollient: Provides a soft, velvety, non-greasy feel on skin; forms a protective, water-resistant film .
- Hair Conditioning Agent: Adds silky softness, provides frizz control, and improves wet and dry combing .
- Film Former / Barrier Agent: Creates a non-greasy, protective film that resists water and waterborne irritants while allowing skin transpiration .
- Spreadability Enhancer: Reduces tackiness and improves the application and rub-out of cosmetic products .
- Lubricant: Reduces friction for plastic, elastomeric, and metal surfaces .
- Release Agent: Prevents sticking in molding and processing applications .
- Antifoaming Agent: Reduces surface tension to control foam in industrial processes .
- Damping Fluid: Provides vibration absorption and consistent damping action for mechanical systems .
Safety Profile (Critical):
· General Hazard Classification: Considered non-toxic, essentially inert, and physiologically harmless . Classified as a combustible liquid (Storage Class 10) . Not classified as a hazardous substance for transport .
· Safety Assessment: Recognized as safe for topical use in cosmetics by major regulatory bodies. Suitable for vegan formulations with no animal cross-contamination . Compliant with "Clean at Sephora," Ulta's "Conscious Beauty," and Credo Clean Standard requirements .
· Irritation & Sensitization: Generally regarded as non-irritating and non-sensitizing to skin. In case of eye contact, rinse with water. Use of N95 dust mask, eyeshields, and gloves recommended when handling .
· Toxicity: Very low acute toxicity. Orally, it is not absorbed by the body .
· Stability: Extremely stable with high oxidation resistance, thermal stability (-40°C to +200°C), and resistance to chemical breakdown . Fungi- and bacteria-resistant .
· Storage: Store in a cool, dry place away from heat and open flame. When stored at or below 35°C in original unopened containers, this product has a usable life of 24 months from date of production . Keep away from strong acids, alkalis, and Lewis acids.
· Shelf Life: Typically 24 months when stored properly .
· Regulatory Status: Available with Kosher and Halal certified grades. Non-GMO available . Meets pharmaceutical standards.
Technical profile:
| Property | Values |
| Appearance | Clear, colorless, viscous liquid |
| Odor | Characteristic, essentially odorless |
| Viscosity (25°C) | 10,000 cSt (mm²/s) |
| Specific Gravity (25°C) | 0.971 - 0.974 g/cm³ |
| Refractive Index (25°C) | ~1.403 - 1.4055 |
| Pour Point / Freezing Point | -50°C |
| Volatility | Not volatile ; Low volatile content (<0.8%) |
| Flash Point (Closed Cup) | > 100°C ; 101.1°C |
| Flash Point (Open Cup) | 326°C |
| Surface Tension (25°C) | 21.5 mN/m |
| Vapor Pressure (25°C) | <5 mmHg |
| Boiling Point | 140°C at 0.002 mmHg |
| Thermal Conductivity | 0.15 - 0.159 W/m·K |
| Dielectric Strength | ~15 kV/mm |
| Service Temperature Range | -40°C to +200°C |
| Solubility | Insoluble in water; soluble in organic solvents (chlorinated, aromatic, aliphatic) |
| Water Hazard Class (WGK) | WGK 1 (slightly hazardous to water) |
| Recommended Use Level | 0.1 – 5.0% in cosmetic formulations (varies by application) |