Methyltrimethoxysilane, 98%

Name: Methyltrimethoxysilane, 98%
Brand: Vaqora Chemicals
SKU: VQ-018375

About Methyltrimethoxysilane, 98%

Vaqora Chemicals supplies Methyltrimethoxysilane (Puriss grade), an electronic material registered under CAS number 1185-55-3 with a typical assay of 98%. Formula C4H12O3Si, molecular weight 136.22 g/mol. Its systematic (IUPAC) name is trimethoxy(methyl)silane. Common synonyms include Trimethoxymethylsilane and Silane, trimethoxymethyl-.

The material typically appears as a colourless liquid. Key physical data: a density of 0.955 g/mL at 25 °C. Store in a cool, well-ventilated place, away from sources of ignition, with the container tightly sealed. It carries the GHS signal word “Danger” with 5 hazard statements. Review the Safety Data Sheet before use.

It is commonly used for semiconductor research, electronic devices, thin films and polymer and resin production. It is used across academic and industrial research and electronics and semiconductors.

Vaqora Chemicals supplies Methyltrimethoxysilane in 250 mL, 500 mL, 1 L and 190 kg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Semiconductor research
Electronic devices
Thin films
Polymer & resin production

Industries

Specifications & identifiers

Chemical identifiers
Product name	Methyltrimethoxysilane, 98%
Catalogue No.	VQ-018375
CAS Number	1185-55-3
IUPAC name	trimethoxy(methyl)silane
Molecular formula	C₄H₁₂O₃Si
Molecular weight	136.22 g/mol
Exact mass	136.0556
Grade	Puriss
Purity / assay	98%
HSN code	29319000
InChIKey	BFXIKLCIZHOAAZ-UHFFFAOYSA-N
SMILES	CO[Si](C)(OC)OC
PubChem CID	14456

Physical properties
Physical form	Liquid
Appearance	Colourless liquid
Density	0.955 g/mL at 25 °C
H-bond donors / acceptors	0 / 3
TPSA	27.7 Å²
Synonyms	Trimethoxymethylsilane, Silane, trimethoxymethyl-, Union carbide A-163, Silane A-163, Dynasylan MTMS, C4H12O3Si, methyl trimethoxysilane, methyl-trimethoxysilane, methyltrimetoxysilane, Mesi(Ome)3, methyltrimethoxy silane, trimethoxy-methyl-silane

Safety & hazard information (GHS)

Flammable

Harmful / irritant

Signal word: Danger

Hazard statements

H225Highly flammable liquid and vapor
H315Causes skin irritation
H317May cause an allergic skin reaction
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P210, P233, P240, P241, P242, P243, P261, P264, P264 + P265, P271, P272, P280, P302 + P352, P303 + P361 + P353, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P333 + P317, P337 + P317, P362 + P364, P370 + P378, P403 + P233

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Methyltrimethoxysilane, 98%?

The CAS Registry Number of Methyltrimethoxysilane, 98% is 1185-55-3. It is also known as Trimethoxymethylsilane, Silane, trimethoxymethyl-, Union carbide A-163.

What is the molecular formula and molecular weight of Methyltrimethoxysilane, 98%?

Methyltrimethoxysilane, 98% has the molecular formula C4H12O3Si and a molecular weight of 136.22 g/mol. Its IUPAC name is trimethoxy(methyl)silane.

Which grade and pack sizes of Methyltrimethoxysilane, 98% can I order?

We supply Methyltrimethoxysilane, 98% in Puriss (98%) grade, in 250 mL, 500 mL, 1 L, 190 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Methyltrimethoxysilane, 98%?

Yes. Every lot of Methyltrimethoxysilane, 98% is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Methyltrimethoxysilane, 98% be shipped internationally?

Yes. Methyltrimethoxysilane, 98% is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.