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Silane USi-6802C – Triethoxycaprylylsilane
High-Purity Branched C8 Alkyl Silane for Cosmetic & Pigment Applications
CAS No.: 2943-75-1
EINECS No.: 220-941-2
Molecular Weight: 276.49 g/mol
Chemical Name:
Triethoxycaprylylsilane
Synonyms:
Triethoxy octyl silaneSilane USi-6802C is a high-purity, branched-chain alkyl-functional silane based on caprylyl (2-ethylhexyl or iso-octyl) rather than linear octyl. Featuring three hydrolyzable ethoxy groups, it serves as a highly effective surface modifier—primarily used in the cosmetics industry and for hydrophobizing titanium dioxide (TiO₂) and other inorganic pigments. Its unique branched structure enhances compatibility with organic matrices while delivering excellent water resistance and dispersion stability.
🧪 Product Description
Chemical Formula: C₈H₁₇Si(OC₂H₅)₃ (branched isomer)
Chemical Structure:
![Structure: (CH₃CH₂)(CH₃)CH(CH₂)₄–Si(OC₂H₅)₃]
(Note: Caprylyl = 2-ethylhexyl group)Unlike its linear counterpart (n-octyltriethoxysilane), USi-6802C uses a branched C8 chain (caprylyl), which offers distinct advantages:
- Superior compatibility with oils, silicones, and organic polymers commonly used in cosmetics and coatings
- Lower crystallinity and better solubility, preventing haze or precipitation in formulations
- Effectively silanizes pigment surfaces (especially TiO₂), reducing agglomeration and improving dispersion, opacity, and UV stability
- Imparts hydrophobicity without compromising sensory properties—critical for skin-feel in makeup and sunscreens
✅ Key Advantage: The branched caprylyl group provides optimal balance between hydrophobic performance, formulation stability, and aesthetic compatibility—making it a preferred choice in premium personal care and pigment treatment.
📊 Typical Technical Data
The following values are typical and not intended for specification. Please confirm with our technical team before finalizing product requirements.
Parameter Specification Appearance Colorless transparent liquid Specific Gravity (20°C) 0.874 – 0.884 g/cm³ Refractive Index (nD25) 1.4120 – 1.4220 Purity (GC, %) ≥ 98.0% Heavy Metal Content ≤ 10 ppm Odour No abnormal odour
🏭 Key Applications
🔹 Cosmetic Formulations
- Used to treat silica, mica, TiO₂, ZnO, and other powders in foundations, sunscreens, lipsticks, and pressed powders
- Enhances water resistance, sweat-proofing, and long-wear performance
- Improves powder flow, spreadability, and skin adhesion while maintaining a non-greasy, silky feel
🔹 Titanium Dioxide (TiO₂) Surface Treatment
- Applied during or post-synthesis to hydrophobize TiO₂ pigment particles
- Reduces photocatalytic activity, improves dispersion in organic media, and prevents moisture-induced clumping
- Essential for high-performance coatings, inks, and plastics requiring stable, bright white pigments
🔹 Specialty Coatings & Inks
- Enhances moisture resistance and pigment wetting in solvent-based systems
- Compatible with silicone resins, acrylics, and polyurethanes
📦 Packaging
Available in industrial-grade containers:
- 200 L drum
- 1000 L IBC tote
All packaging ensures product purity and stability during storage and transport.
⚠️ Safety & Storage
- Store in original unopened containers at ambient temperature
- Keep away from heat and open flame (product is flammable)
- Shelf Life: 12 months from production date under recommended conditions
- Use in well-ventilated areas; wear gloves and eye protection
- Consult the latest Safety Data Sheet (SDS) at www.usi-chemical.com or upon request
📞 Contact Us
Nanjing Union Silicon Chemical Co., Ltd.
Your Trusted Partner for High-Purity Functional Silanes in Cosmetics & Advanced Materials- Headquarters:
Room 2002, Overseas Chinese Plaza, No.1 Daqiao North Road, Nanjing 210031, Jiangsu, P.R. China - Factory Address:
Dongcheng Guanli District, Gaizhou 115200, Liaoning, P.R. China - Tel: +86-25-5889 5266 / 5889 5699
- Fax: +86-25-5830 5349
- Website: www.usi-chemical.com
- Email: inquiry@usichemical.com
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