Description

Tetra(Isotridecyl) Orthosilicate is a branched-chain alkyl orthosilicate ester, a key organosilicon intermediate. This compound is valued for its ability to introduce hydrophobic, bulky isotridecyl groups into materials, enhancing properties like water repellency and compatibility with organic matrices. It is primarily sought by formulators and manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as in specialty polymer synthesis and surface modification applications.

Application

• Crosslinking Agent: Used in silicone and organic polymer systems to introduce crosslinks, improving thermal stability and mechanical properties.
• Hydrophobic Surface Modifier: Imparts water-repellent characteristics to surfaces, textiles, and inorganic fillers like silica.
• Intermediate for Silicone Resins: Serves as a building block in the synthesis of specialty branched and high-molecular-weight silicone polymers.
• Adhesive & Sealant Formulations: Enhances adhesion and flexibility in high-performance sealants and adhesive products.
• Lubricant & Grease Additive: Functions as an extreme pressure (EP) additive and viscosity modifier in synthetic lubricants.
• Coupling Agent: Improves the interface and dispersion between organic polymers and inorganic materials or pigments.

Basic Information

Product Name	Tetra(Isotridecyl) Orthosilicate
CAS No.	93776-40-0
Molecular Formula	C52H108O4Si
Molecular Weight	849.5 g/mol
Synonyms	Tetraisotridecyl orthosilicate; Isotridecyl orthosilicate; Silicic acid (H4SiO4), tetraisotridecyl ester; Tetra(iso-tridecyl) silicate; Tetraisotridecyl silicate; Orthosilicic acid tetraisotridecyl ester; Tetra-C13 alkyl silicate (branched)
EINECS	Contact for details

Quality Control

Our Tetra(Isotridecyl) Orthosilicate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure consistent purity and performance. A Certificate of Analysis (COA) detailing key specifications such as assay, identity, and impurity profile is provided with every shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent degradation by atmospheric moisture.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC or Titration)	≥ 95.0%
Specific Gravity (20°C)	0.88 - 0.92
Refractive Index (20°C)	1.450 - 1.460
Moisture (Karl Fischer)	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.