Trimethoxy(methoxymethyl)silane: Properties & Lab Use FAQs

Trimethoxy(methoxymethyl)silane is a bifunctional organosilane reagent bearing both a methoxymethyl group and three methoxy substituents on silicon, making it a versatile building block for surface modification, sol-gel chemistry, and synthetic applications in modern research laboratories.

Chemical Name

Trimethoxy(methoxymethyl)silane

SKU

T192176

Molecular Formula

C5H14O4Si

Functional Groups

Three methoxy groups on silicon plus one methoxymethyl (–CH2OCH3) substituent

Key Reactivity

Undergoes hydrolysis and condensation under acidic or basic conditions to form siloxane networks; methoxymethyl group provides additional functionalization handle

Storage Condition

Store under inert atmosphere, away from moisture, at cool and dry conditions

What Is Trimethoxy(methoxymethyl)silane and Why Is It Used?

Trimethoxy(methoxymethyl)silane (SKU T192176) is a small-molecule organosilane in which a silicon center carries three methoxy (–OCH3) groups and one methoxymethyl (–CH2OCH3) group. The three methoxy groups render it highly reactive toward hydrolysis and subsequent silanol condensation, enabling covalent attachment to hydroxylated surfaces such as glass, silica, or metal oxides. The pendant methoxymethyl arm provides a carbon-tethered ether linkage that can be exploited as a protecting group, a linker, or a precursor to further functionalization.

Researchers employ this reagent in sol-gel processing to introduce ether-containing organic domains into inorganic silica matrices, in surface science to tailor wettability and adhesion, and in organic synthesis as a silyl-ether equivalent for selective protection strategies.

Handling, Safety, and Storage Guidelines

As an alkoxysilane, Trimethoxy(methoxymethyl)silane is sensitive to atmospheric moisture. Exposure to humidity causes progressive hydrolysis of the methoxy groups, generating methanol and ultimately leading to premature gelation or oligomerization. To preserve reagent integrity, always handle under an inert atmosphere (nitrogen or argon) using standard Schlenk or glovebox techniques when high purity is required.

Store the compound in a tightly sealed container under inert gas in a cool, dry location away from heat sources and strong oxidizers. Because methanol is a byproduct of hydrolysis, adequate ventilation should be maintained during use. Consult the product Safety Data Sheet (SDS) prior to use for full hazard, first-aid, and disposal information. Personal protective equipment including chemical-resistant gloves, safety goggles, and a laboratory coat is recommended.

Key Reactions and Application Areas

Hydrolysis-condensation (sol-gel): Under aqueous acidic or basic conditions, the three Si–OCH3 bonds hydrolyze to Si–OH (silanol) groups, which then condense with each other or with surface silanols to build Si–O–Si networks. This underlies applications in hybrid organic-inorganic coatings, nanoparticle surface functionalization, and mesoporous silica synthesis.

Surface silanylation: When applied to activated oxide surfaces, the reagent forms covalent monolayers or multilayers that introduce ether-functional organic groups, modifying surface energy, protein adhesion, or chromatographic selectivity.

Synthetic chemistry: The methoxymethyl (MOM-like) group can serve as a masked hydroxymethyl equivalent or participate in electrophilic reactions under Lewis-acid activation, providing synthetic chemists with a versatile handle for building complex molecules.

Quality, Purity, and Specifications

Aladdin Scientific supplies Trimethoxy(methoxymethyl)silane (T192176) as a research-grade reagent. Purity specifications and analytical data, including GC purity, refractive index, and density, are provided on the product page and Certificate of Analysis (CoA) accompanying each lot. Researchers requiring very high purity for sensitive applications such as self-assembled monolayer (SAM) deposition or controlled polymerization should request the CoA and verify the analytical results before use.

If specific purity levels, custom pack sizes, or bulk quantities are required, contact Aladdin Scientific's technical sales team. Grade selection should be guided by the sensitivity of the intended application and the acceptable threshold for silanol-containing impurities resulting from partial hydrolysis during storage.

Ordering, Shipping, and Technical Support

Trimethoxy(methoxymethyl)silane (SKU T192176) can be ordered directly through the Aladdin Scientific website. Because the compound is moisture-sensitive, it is packaged under inert gas and shipped in appropriate sealed containers to maintain quality during transit. Expedited shipping options are available; please review Aladdin Scientific's shipping and delivery policy for details on cold-chain or inert-atmosphere transport requirements for this class of reagent.

For technical questions about application suitability, compatibility, or experimental protocols involving this silane, contact Aladdin Scientific's technical support team via the website. For questions related to returns, refunds, or order status, the customer service team is available through standard support channels outlined in the Help and Customer Service section of the website.

Frequently asked questions

What is the molecular formula and structure of Trimethoxy(methoxymethyl)silane?

Trimethoxy(methoxymethyl)silane has the molecular formula C5H14O4Si. Its silicon atom bears three methoxy (–OCH3) groups and one methoxymethyl (–CH2OCH3) substituent, giving it four oxygen-containing ligands in a tetrahedral arrangement around silicon. This dual-ether functionality distinguishes it from simpler alkoxysilanes.

Why is Trimethoxy(methoxymethyl)silane sensitive to moisture, and how should I protect it?

The Si–OCH3 bonds in this compound are susceptible to nucleophilic attack by water, triggering hydrolysis that releases methanol and generates reactive silanol (Si–OH) species. These silanols rapidly condense, forming siloxane oligomers or gels and degrading the reagent. To prevent this, always store and handle the compound under an inert atmosphere (N2 or Ar) in sealed containers, and use syringe or cannula transfer techniques to minimize air exposure during dispensing.

What are the typical research applications for Trimethoxy(methoxymethyl)silane?

This reagent is used in sol-gel chemistry to incorporate ether-functional organic groups into silica-based hybrid materials. It also serves as a surface silanylation agent for glass, silica nanoparticles, and metal oxide substrates, introducing ether linkages that alter surface polarity and biomolecule interaction. In organic synthesis, the methoxymethyl group can function as a protected hydroxymethyl equivalent or an electrophilic carbon source under Lewis-acid activation.

Can I use Trimethoxy(methoxymethyl)silane for self-assembled monolayer (SAM) deposition?

Trialkoxysilanes can in principle form SAMs on hydroxylated surfaces; however, the tendency of trifunctional silanes to undergo inter-molecular condensation often results in multilayer or polydisperse films rather than well-defined monolayers. For well-controlled SAM formation, rigorous anhydrous conditions, low reagent concentration, and carefully activated surfaces are essential. Researchers should validate surface coverage and film uniformity by techniques such as ellipsometry, XPS, or contact-angle measurement for their specific substrate and conditions.

How do I place an order for T192176 and what should I check before purchasing?

T192176 can be ordered directly from the Aladdin Scientific website by searching the SKU. Before purchasing, confirm that the required pack size, purity grade, and quantity are available, and review the product page for current stock and lead-time information. It is also advisable to download the SDS and CoA to verify the purity specifications meet your experimental requirements and to prepare appropriate storage conditions before the shipment arrives.

References

1. Iler, R. K. The Chemistry of Silica. Wiley-Interscience, 1979. (General reference for silanol condensation and sol-gel chemistry of alkoxysilanes.)
2. Brinker, C. J.; Scherer, G. W. Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing. Academic Press, 1990. (Foundational text on alkoxysilane hydrolysis-condensation mechanisms.)
3. Plueddemann, E. P. Silane Coupling Agents, 2nd ed. Plenum Press, 1991. (Comprehensive treatment of alkoxysilane surface chemistry and adhesion promotion.)

Products are supplied for research and development use only. Not for use in humans, animals, diagnosis, or therapy.