Speciality Chemicals

Dodecyltrimethoxysilane

  • CAS No.3069-21-4
  • GradeIndustrial / Pharmaceutical
  • Availability● In Stock

High purity Dodecyltrimethoxysilane for superior hydrophobicity and surface modification. Ideal for mineral fillers and inorganic treatments.

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Product Technical Details

Product Overview

Dodecyltrimethoxysilane is a premium organosilicon compound designed for advanced surface modification and hydrophobic treatment applications. As a long-chain alkyl silane, it features a stable dodecyl group attached to a reactive trimethoxysilane functionality. This unique molecular structure allows it to bridge organic and inorganic materials effectively, providing exceptional water repellency and compatibility in various industrial formulations. Our manufacturing process ensures high chemical purity and consistent performance batch after batch, meeting the rigorous demands of global chemical supply chains.

Key Chemical Properties

The efficacy of Dodecyltrimethoxysilane lies in its dual functionality. The methoxy groups undergo hydrolysis to form silanol intermediates, which subsequently condense to create robust siloxane bonds with inorganic substrates such as glass, minerals, and metals. Meanwhile, the long twelve-carbon alkyl chain orientates outward, creating a dense hydrophobic barrier that significantly reduces surface energy. This mechanism not only prevents water absorption but also enhances the dispersion of fillers within polymer matrices. The compound exhibits excellent stability under standard storage conditions, with a boiling point suitable for various processing temperatures without premature degradation.

Industrial Applications

This specialty chemical is extensively utilized across multiple sectors due to its versatile coupling and water-repellent properties. Key application areas include:

  • Mineral Filler Treatment: Improves the compatibility of calcium carbonate, talc, and silica within rubber and plastic compounds.
  • Construction Materials: Used as an impregnating water-repellent for concrete, brick, and stone surfaces to prevent moisture damage.
  • Coatings and Inks: Enhances scratch resistance and water beading effects in protective coatings and industrial inks.
  • Pigment Dispersion: Facilitates better wetting and dispersion of inorganic pigments, leading to improved color strength and stability.

Specifications and Quality Control

We adhere to strict quality management systems to guarantee product reliability. Each batch is tested against comprehensive specifications to ensure compliance with international standards. The following table outlines the typical physical and chemical parameters:

ParameterSpecification
AppearanceClear to straw liquid
Purity (GC)≥97.0%
Density0.89 g/cm³
Boiling Point125°C
Flash Point108°C
Refractive Index1.4274

Storage and Handling

To maintain optimal quality, Dodecyltrimethoxysilane should be stored in a cool, ventilated area away from direct sunlight and moisture sources. Containers must remain tightly sealed when not in use to prevent hydrolysis caused by atmospheric humidity. The standard packaging option is 180 kg per drum, though we offer flexible packaging solutions tailored to specific customer logistics requirements. Proper handling procedures, including the use of personal protective equipment, are recommended during transfer and processing to ensure safety in the workplace.