Octamethyltrisiloxane

Name: Octamethyltrisiloxane
Brand: Vaqora Chemicals
SKU: VQ-051977

About Octamethyltrisiloxane

Octamethyltrisiloxane is an organosilicon compound carrying the CAS registry number 107-51-7. Formula C8H24O2Si3, molecular weight 236.53 g/mol. Systematically, it is named dimethyl-bis(trimethylsilyloxy)silane. Alternative names: Trisiloxane, octamethyl- and 1,1,1,3,3,5,5,5-Octamethyltrisiloxane.

Keep the container tightly sealed and store it in a cool, dry area. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

Key uses span organic synthesis and API synthesis. Our customers for this product work in pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 100 mg, 250 mg, 1 g and 5 g, and every batch ships with a Certificate of Analysis (COA) and we export worldwide. SDS and detailed specification sheets can be requested with your quotation. Custom pack sizes, bulk quantities and specific analytical data can be arranged on request.

Typical applications

Organic synthesis
API synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Octamethyltrisiloxane
Catalogue No.	VQ-051977
CAS Number	107-51-7
IUPAC name	dimethyl-bis(trimethylsilyloxy)silane
Molecular formula	C₈H₂₄O₂Si₃
Molecular weight	236.53 g/mol
Exact mass	236.1084
InChIKey	CXQXSVUQTKDNFP-UHFFFAOYSA-N
SMILES	C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C
PubChem CID	24705

Physical properties
Physical form	Other
H-bond donors / acceptors	0 / 2
TPSA	18.5 Å²
Synonyms	Trisiloxane, octamethyl-, 1,1,1,3,3,5,5,5-Octamethyltrisiloxane, Pentamethyl(trimethylsilyloxy)disiloxane, Dimethylbis(trimethylsiloxy)silane, Pentamethyl(trimethylsiloxy)disiloxane, Dimethicone 350, Silicone oil PMX-200, Trisiloxane, 1,1,1,3,3,5,5,5-octamethyl-, Methylsilicone oil, Dimethylsilicone oil,, Hexamethyloxy disilane

Safety & hazard information (GHS)

Flammable

Signal word: Warning

Hazard statements

H226Flammable liquid and vapor
H413May cause long lasting harmful effects to aquatic life

Precautionary statements: P210, P233, P240, P241, P242, P243, P273, P280, P303 + P361 + P353, P370 + P378, P403 + P235, P501

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 Octamethyltrisiloxane?

The CAS Registry Number of Octamethyltrisiloxane is 107-51-7. It is also known as Trisiloxane, octamethyl-, 1,1,1,3,3,5,5,5-Octamethyltrisiloxane, Pentamethyl(trimethylsilyloxy)disiloxane.

What is the molecular formula and molecular weight of Octamethyltrisiloxane?

Octamethyltrisiloxane has the molecular formula C8H24O2Si3 and a molecular weight of 236.53 g/mol. Its IUPAC name is dimethyl-bis(trimethylsilyloxy)silane.

Which grade and pack sizes of Octamethyltrisiloxane can I order?

We supply Octamethyltrisiloxane, in 100 mg, 250 mg, 1 g, 5 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Octamethyltrisiloxane?

Yes. Every lot of Octamethyltrisiloxane 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 Octamethyltrisiloxane be shipped internationally?

Yes. Octamethyltrisiloxane 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.