Tetrapropoxysilane Cas 682-01-9
Chemical Name: Tetrapropoxysilane
Synonyms: Tetrapropyl orthosilicate; Orthosilicic acid tetrapropyl ester; silicon tetra-n-propoxide
CAS No.: 682-01-9
Molecular Fomula: C12H28O4Si
Molecular weight: 264.43
Appearance: colorless liquid
Assay:≥98.0%
Tetrapropoxysilane (CAS 682-01-9) Technical Guide
Table of Contents
1. Product Specifications & Comparative Analysis
| Parameter | Specification | Competitor A | Competitor B |
|---|---|---|---|
| CAS Number | 682-01-9 | 682-01-9 | 682-01-9 |
| Purity | ≥97.0% | 95% | 98% |
| Appearance | Colorless liquid | Colorless liquid | Colorless liquid |
| Density (20°C) | 0.9160±0.002 g/ml | 0.916 g/ml | 0.9±0.1 g/cm³ |
| Flash Point | 95°C | 203°F (95°C) | 95.0±0.0°C |
2. Key Applications & Industrial Uses
Core Functionalities:
- Coupling Agent: Enhances adhesion between organic polymers and inorganic substrates in coatings.
- Cross-Linking Agent: Improves thermal stability and mechanical strength in RTV-2 silicone rubbers.
- Surface Modifier: Treats glass fibers and minerals to optimize composite material performance.
Industry-Specific Implementations:
- Adhesives: Critical component in two-part room-temperature vulcanizing (RTV-2) systems
- Coatings: Provides water resistance in industrial paint formulations
- Electronics: Used as dielectric material in encapsulation compounds
3. Operational Guidelines & Formulation Examples
RTV-2 Silicone Rubber Formulation
Component A:
- 107 Silicone Rubber (20,000-80,000 cP): 500 parts
- Silicone Oil (100-1,000 cP): 50-100 parts
- Calcium Carbonate: 500 parts
Mixing Protocol: Homogenize in planetary mixer at ambient temperature
Component B:
- Carbon Black Dispersion: 500 parts
- Tetrapropoxysilane: 200 parts
- Silane Coupling Agent (KH-550): 100 parts
- Fumed Silica: 10-20 parts
Curing Process: Vacuum mixing with incremental addition of components
4. Client Success Stories
Case Study 1: Advanced Adhesive Solutions
Client: Leading Asian Silicone Manufacturer
- Challenge: Required <5-minute work time with >90% bond strength retention
- Solution: Optimized tetrapropoxysilane ratio (12:1 A:B component)
- Outcome: Achieved 93% strength retention with 4.5-minute processing window
Case Study 2: High-Temperature Coatings
Client: European Industrial Coatings Supplier
- Requirement: Develop 300°C-stable anti-corrosive coating
- Implementation: 3% tetrapropoxysilane in epoxy-siloxane hybrid system
- Performance: Passed 1,000-hour salt spray test (ASTM B117)
5. Contact for Technical Consultation
For formulation support or bulk purchasing inquiries:
| Technical Support | info@vivalr.com |
| Sales Department | (86) 15866781826 |



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