Phenyl Tris(Trimethylsiloxy)Silane-CAS 2116-84-9
Product Name: Phenyl Tris(Trimethylsiloxy)Silane
Alias: Phenyl Trimethylsiloxy Silicate, PH-34, Phenyl Silicone Fluid
INCI Name: Phenyl Tris(Trimethylsiloxy)Silane
CAS Number: 2116-84-9
Molecular Formula: C₁₅H₃₂O₃Si₄
Molecular Weight: 372.75
Purity Content: ≥99.0%
Appearance: Colorless transparent oily liquid
Grade: Cosmetic & High-purity Industrial Grade
MOQ: 25KG
Package: 25KG/200KG Plastic Drum
Shelf Life: 12 Months (Sealed & Stored in Shady and Dry Place)
Phenyl Tris(Trimethylsiloxy)Silane, Phenyl Trimethylsiloxy Silicate, PH-34 Silicone Oil, High Refractive Index Silicone, Cosmetic Film-forming Agent, Waterproof Smoothing Silicone, Transparent Makeup Base Raw Material
Phenyl Tris(Trimethylsiloxy)Silane-CAS 2116-84-9
Phenyl Tris(Trimethylsiloxy)Silane (PH-34) is a high-purity functional phenyl-modified silicone raw material specially developed for high-end cosmetics. Different from conventional dimethyl silicone oil, it introduces phenyl functional groups and multi-trimethylsiloxy branched chain structure, possessing high refractive index, high light transmittance and excellent low-temperature fluidity.
The product features ultra-low viscosity, rapid spreading, and non-greasy skin feel, which can form a uniform, transparent and breathable protective film on the skin surface. It has excellent waterproof, sweat-resistant and makeup-fixing properties, effectively improving the floating powder and cracking problems of foundation makeup.
With unique light-reflecting and brightening effects, it can enhance skin surface gloss and create natural translucent muscle texture. In addition, it has good compatibility with various cosmetic oils and waxes, stable chemical properties, no irritation, no odor, and excellent temperature and oxidation resistance. It is a core high-end silicone substitute for brightening, smoothing and long-lasting makeup cosmetic formulas.



Key Benefits
• High Refractive Index & Transparent Brightening: Unique phenyl structure improves refractive index significantly, brings natural translucent gloss to skin and makeup, avoiding dull and flat cosmetic finish.
• Ultra-smooth Non-greasy Skin Feel: Low viscosity and super spreading power, light and silky touch, no greasy residue, greatly upgrade the delicate texture of high-end skin care and makeup products.
• Waterproof Sweat-proof Long-lasting Makeup: Form dense breathable protective film, isolate external moisture and sweat, effectively prevent makeup fading, floating powder and cracking, extend makeup lasting time.
• Excellent Formula Compatibility: Perfectly compatible with silicone oil, ester oil, vegetable oil and wax raw materials, uniform system without delamination, stable formula performance.
• High Temperature & Oxidation Resistance: Modified branched chain structure enhances thermal stability and oxidation resistance, no discoloration or deterioration in high and low temperature environments, suitable for long-term product storage.
• Mild & Safe Cosmetic Grade: High purity without impurities, odorless and non-irritating, compliant with global cosmetic raw material standards, safe for facial and sensitive skin use.
Applications
• High-end Base Makeup Products: Transparent makeup primer, silky foundation, long-lasting cushion cream, brightening bb cream and cc cream.
• Light Luxury Skin Care Series: Brightening essence, moisturizing lotion, softening skin cream, high-transparency skin care finishing products.
• Waterproof Sunscreen Products: High-power waterproof sunscreen lotion, refreshing sunscreen cream, sweat-resistant outdoor sun protection formula.
• Color Cosmetics & Finishing Makeup: High-gloss contour powder, setting spray, eye shadow, lipstick brightening base, high-shine cosmetic raw materials.
• Special Functional Cosmetics: Sensitive skin mild care products, high-transparency smoothing formulas, long-acting moisturizing and brightening daily chemical products.
Certificate Of Analysis (COA)
Test Item | Standard Specification | Test Result |
Product Name | Phenyl Tris(Trimethylsiloxy)Silane | Compliant |
CAS No. | 2116-84-9 | Compliant |
Appearance (25℃) | Colorless transparent oily liquid | Colorless transparent oily liquid |
Purity | ≥99.0% | 99.3% |
Refractive Index (25℃) | 1.400-1.410 | 1.405 |
Viscosity (25℃, mPa·s) | 5-15 | 9 |
Density (g/cm³) | 0.95-0.98 | 0.96 |
Moisture Content | ≤0.1% | 0.06% |
Conclusion | Conforms to cosmetic grade enterprise standards | Qualified |
Frequently Asked Questions (FAQ)
• Q1: What is the core advantage of PH-34 compared with ordinary silicone oil?
A1: Ordinary dimethyl silicone oil only provides simple smoothing effect, while PH-34 phenyl modified silicone has higher refractive index, natural brightening and translucent skin effect, excellent waterproof and long-lasting makeup fixing performance, and no greasy feeling, which is exclusive for high-end brightening makeup formulas.
• Q2: What is the recommended formula addition ratio?
A2: 3%-10% for primer and foundation products, 2%-8% for brightening skin care essence, 4%-12% for waterproof sunscreen, 1%-5% for lipstick and eye shadow color cosmetics, adjustable according to product gloss and lasting effect requirements.
• Q3: Can PH-34 solve foundation floating powder and dullness?
A3: Absolutely yes. It forms a uniform breathable film to fit the skin tightly, improve the adhesion of foundation, eliminate floating powder and card powder problems, and increase skin light transmittance to avoid dull and flat makeup.
• Q4: Is PH-34 mild and safe for facial skin?
A4: Yes, high-purity cosmetic grade raw material, no odor, no irritation, no harmful residues, compliant with domestic and EU cosmetic regulations, safe for long-term facial and sensitive skin use.
• Q5: What oils can PH-34 be compounded with?
A5: It has ultra-wide compatibility, perfectly compatible with dimethyl silicone oil, cyclopentasiloxane, ester oil, natural vegetable oil and cosmetic waxes, no delamination or precipitation after compounding, stable system.
• Q6: Does the product support bulk supply and customized technical service?
A6: The product adopts standardized cosmetic grade production, with stable batch purity and sufficient inventory. It supports long-term bulk supply and global export, and provides professional formula debugging and skin feel optimization technical services.
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