Tetramethyl orthosilicate, 98%

Name: Tetramethyl orthosilicate, 98%
Brand: Vaqora Chemicals
SKU: VQ-011150

About Tetramethyl orthosilicate, 98%

Vaqora Chemicals supplies Tetramethyl orthosilicate, an organosilicon compound registered under CAS number 681-84-5 at a purity of 98%. Formula C4H12O4Si, molecular weight 152.22 g/mol. The IUPAC name is tetramethyl silicate. Common synonyms include Tetramethoxysilane and TMOS.

It is supplied as a colourless liquid. Reported physical data include a melting point of -4 °C and a boiling point of 121-122 °C. Keep containers tightly closed in a cool, well-ventilated area away from heat and ignition sources. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

It is commonly used for organic synthesis and API synthesis. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

Available in 25 g, 100 g, 500 g and 5 kg packs, Tetramethyl orthosilicate is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Organic synthesis
API synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Tetramethyl orthosilicate, 98%
Catalogue No.	VQ-011150
CAS Number	681-84-5
IUPAC name	tetramethyl silicate
Molecular formula	C₄H₁₂O₄Si
Molecular weight	152.22 g/mol
Exact mass	152.0505
Purity / assay	98%
HSN code	29319090
InChIKey	LFQCEHFDDXELDD-UHFFFAOYSA-N
SMILES	CO[Si](OC)(OC)OC
PubChem CID	12682

Physical properties
Physical form	Liquid
Appearance	Colourless liquid
Melting point	-4 °C
Boiling point	121-122 °C
Density	1.023 g/mL at 25 °C
H-bond donors / acceptors	0 / 4
TPSA	36.9 Å²
UN number	UN 2606
Synonyms	Tetramethoxysilane, TMOS, Methyl orthosilicate, Methyl silicate, Methyl Silicate 39, Silane, tetramethoxy-, Methyl silicate 28, Methyl silicate ((MeO)4Si), TL 190, Methyl silicate ((CH3)4SiO4), Silicic acid, methyl ester of ortho-, TSL 8114

Safety & hazard information (GHS)

Flammable

Corrosive

Toxic

Harmful / irritant

Health hazard

Signal word: Danger

Hazard statements

H226Flammable liquid and vapor
H315Causes skin irritation
H318Causes serious eye damage
H330Fatal if inhaled
H335May cause respiratory irritation
H372Causes damage to organs through prolonged or repeated exposure

Precautionary statements: P210, P233, P240, P241, P242, P243, P260, P261, P264, P264 + P265, P270, P271, P280, P284, P302 + P352, P303 + P361 + P353, P304 + P340, P305 + P354 + P338, P316, P317, P319, P320, P321, P332 + P317

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 Tetramethyl orthosilicate, 98%?

The CAS Registry Number of Tetramethyl orthosilicate, 98% is 681-84-5. It is also known as Tetramethoxysilane, TMOS, Methyl orthosilicate.

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

Tetramethyl orthosilicate, 98% has the molecular formula C4H12O4Si and a molecular weight of 152.22 g/mol. Its IUPAC name is tetramethyl silicate.

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

We supply Tetramethyl orthosilicate, 98% in (98%) grade, in 25 g, 100 g, 500 g, 5 kg, 200 kg packs. Larger bulk quantities and custom packing are quoted on request.

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

Yes. Every lot of Tetramethyl orthosilicate, 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 Tetramethyl orthosilicate, 98% be shipped internationally?

Yes. Tetramethyl orthosilicate, 98% is classified as hazardous (UN 2606), 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.