Trimethoxymethylsilane, Purity by GC ≥ 99%

Product Introduction

Trimethoxymethylsilane (CAS No. 1185-55-3) is an organosilane compound containing one methyl group and three methoxy groups attached to a silicon atom. It is also widely known as Methyltrimethoxysilane (MTMS).

The three methoxy groups provide reactive sites for hydrolysis and subsequent condensation, allowing Trimethoxymethylsilane to function as a silane coupling agent, crosslinking reagent, surface modifier, and precursor for siloxane and hybrid materials.

Trimethoxymethylsilane is used in sol-gel chemistry, surface modification, coatings, polymer composites, silicone materials, and organic-inorganic hybrid material research.

Mechanism / Principle

Hydrolysis and Condensation

The three Si–OCH₃ groups in Trimethoxymethylsilane can react with water to form silanol groups. These silanol groups can subsequently undergo condensation to form Si–O–Si bonds.

This hydrolysis-condensation behavior enables Trimethoxymethylsilane to contribute to:

• Siloxane network formation
• Sol-gel synthesis
• Crosslinking
• Surface modification
• Organic-inorganic hybrid material formation

The methyl group remains attached to silicon and contributes an organic component to the resulting siloxane or organosilica structure.

Surface Modification

Trimethoxymethylsilane can interact with hydroxyl-containing inorganic surfaces through silane chemistry, enabling modification of surface properties and interfacial compatibility.

Key Research Applications

1. Silane Coupling and Surface Modification

Trimethoxymethylsilane is used to modify inorganic surfaces and improve organic-inorganic interfaces.

Applications include:

• Glass surface modification
• Silica surface treatment
• Mineral filler modification
• Inorganic particle treatment
• Interface engineering

2. Sol-Gel Chemistry

The hydrolysis and condensation of Trimethoxymethylsilane make it useful as an organosilane precursor for sol-gel materials.

Applications include:

• Sol-gel synthesis
• Organosilica materials
• Siloxane networks
• Hybrid inorganic-organic materials
• Porous materials

3. Silicone and Polymer Materials

Trimethoxymethylsilane can participate in the formation and crosslinking of siloxane-containing materials.

Applications include:

• Silicone materials
• Polymer crosslinking
• Functional polymer development
• Siloxane network formation
• Polymer modification

4. Coatings and Adhesives

The reactive alkoxysilane groups make Trimethoxymethylsilane useful in surface and interface-related material formulations.

Applications include:

• Protective coatings
• Functional coatings
• Adhesive formulations
• Surface treatment
• Moisture-resistant materials

5. Composite Materials

Trimethoxymethylsilane can be used to modify inorganic fillers and improve compatibility with organic polymer matrices.

Applications include:

• Polymer composites
• Mineral-filled polymers
• Glass and silica composites
• Reinforced polymer materials
• Organic-inorganic composites

6. Functional Materials Research

Trimethoxymethylsilane provides a convenient organosilicon precursor for developing materials with controlled surface and network properties.

Applications include:

• Hybrid materials
• Nanocomposites
• Functional surfaces
• Organosilica materials
• Advanced coating materials

Advantages

• Reactive trialkoxysilane structure
• Three methoxy groups provide hydrolysis and condensation functionality
• Suitable for siloxane network formation
• Useful for surface modification
• Applicable to sol-gel synthesis
• Suitable for organic-inorganic hybrid materials
• Useful in polymer and composite research
• Applicable to coatings and adhesives
• Available in high-purity research grades

Storage & Handling

• Store in a tightly closed container.
• Protect from moisture and humidity.
• Store in a cool, dry and well-ventilated environment.
• Protect from excessive heat and direct light.
• Avoid prolonged exposure to atmospheric moisture.
• Handle in a suitable fume hood.
• Avoid contact with skin and eyes.
• Wear appropriate gloves, protective clothing, and eye protection.
• Use dry equipment and compatible containers.
• Follow the product-specific SDS for handling, storage, and disposal.

FUJIFILM Wako lists Trimethoxymethylsilane with protect-from-light storage and notes that its product is packed under argon.

Research Areas

Researchers working in the following fields may benefit from Trimethoxymethylsilane (CAS No. 1185-55-3):

• Organosilicon chemistry
• Polymer chemistry
• Silicone materials
• Sol-gel chemistry
• Surface chemistry
• Materials science
• Coatings
• Adhesives
• Composite materials
• Nanomaterials

Q1: What is Trimethoxymethylsilane?

A: Trimethoxymethylsilane is an organosilane compound with CAS No. 1185-55-3, molecular formula C₄H₁₂O₃Si, and molecular weight 136.22 g/mol.

Q2: Is Trimethoxymethylsilane the same as Methyltrimethoxysilane?

A: Yes. Trimethoxymethylsilane and Methyltrimethoxysilane are names for the same compound, CAS 1185-55-3. PubChem, NIST, Sigma-Aldrich, and FUJIFILM Wako all associate these names with the same CAS number.

Q3: What is the abbreviation for Trimethoxymethylsilane?

A: MTMS is commonly used as an abbreviation for Trimethoxymethylsilane/Methyltrimethoxysilane.

Q4: What is Trimethoxymethylsilane used for?

A: It is mainly used as an organosilane reagent for surface modification, sol-gel synthesis, siloxane materials, coatings, polymer composites, and organic-inorganic hybrid materials.

Q5: Is Trimethoxymethylsilane moisture sensitive?

A: Yes. Its alkoxy groups can undergo hydrolysis in the presence of water, so moisture exposure should be minimized during storage and handling.

Q6: What is the molecular weight of Trimethoxymethylsilane?

A: The molecular weight is 136.22 g/mol.

Q7: What is the molecular formula of CAS 1185-55-3?

A: The molecular formula is C₄H₁₂O₃Si.

Q8: Can Trimethoxymethylsilane be used in sol-gel synthesis?

A: Yes. Its hydrolysis and condensation reactions make it a useful precursor for siloxane, organosilica, and organic-inorganic hybrid materials.