Dodecamethylpentasiloxane

About Dodecamethylpentasiloxane

Dodecamethylpentasiloxane is an organosilicon compound carrying the CAS registry number 141-63-9. Its molecular formula is C12H36O4Si5 and its molecular weight is 384.84 g/mol. Its systematic (IUPAC) name is bis[[dimethyl(trimethylsilyloxy)silyl]oxy]-dimethylsilane. Alternative names: Pentasiloxane, dodecamethyl- and Silicone liquid.

Store sealed in a dry, well-ventilated location away from incompatible materials. It carries the GHS signal word “Warning” with 4 hazard statements. Review the Safety Data Sheet before use.

Typical applications include organic synthesis and API synthesis. It is used across 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	Dodecamethylpentasiloxane
Catalogue No.	VQ-051231
CAS Number	141-63-9
IUPAC name	bis[[dimethyl(trimethylsilyloxy)silyl]oxy]-dimethylsilane
Molecular formula	C₁₂H₃₆O₄Si₅
Molecular weight	384.84 g/mol
Exact mass	384.146
InChIKey	FBZANXDWQAVSTQ-UHFFFAOYSA-N
SMILES	C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C
PubChem CID	8853

Physical properties
Physical form	Other
H-bond donors / acceptors	0 / 4
TPSA	36.9 Å²
Synonyms	1,1,1,3,3,5,5,7,7,9,9,9-Dodecamethylpentasiloxane, Pentasiloxane, dodecamethyl-, Pentasiloxane, 1,1,1,3,3,5,5,7,7,9,9,9-dodecamethyl-, Silicone liquid, 1,1,1,3,3,5,5,7,7,9,9,9Dodecamethylpentasiloxane, Pentasiloxane, 1,1,1,3,3,5,5,7,7,9,9,9dodecamethyl, bis[[dimethyl(trimethylsilyloxy)silyl]oxy]-dimethyl-silane, Pentasiloxane,1,1,1,3,3,5,5,7,7,9,9,9-dodecamethyl-, 2,2,4,4,6,6,8,8,10,10-decamethyl-3,5,7,9-tetraoxa-2,4,6,8,10-pentasilaundecane, 1,1,1,3,3,5,5,7,7,9,9,9-Dodecamethylpentasiloxane #

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
H413May cause long lasting harmful effects to aquatic life

Precautionary statements: P261, P264, P264 + P265, P271, P273, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, 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 Dodecamethylpentasiloxane?

The CAS Registry Number of Dodecamethylpentasiloxane is 141-63-9. It is also known as 1,1,1,3,3,5,5,7,7,9,9,9-Dodecamethylpentasiloxane, Pentasiloxane, dodecamethyl-, Pentasiloxane, 1,1,1,3,3,5,5,7,7,9,9,9-dodecamethyl-.

What is the molecular formula and molecular weight of Dodecamethylpentasiloxane?

Dodecamethylpentasiloxane has the molecular formula C12H36O4Si5 and a molecular weight of 384.84 g/mol. Its IUPAC name is bis[[dimethyl(trimethylsilyloxy)silyl]oxy]-dimethylsilane.

Which grade and pack sizes of Dodecamethylpentasiloxane can I order?

We supply Dodecamethylpentasiloxane, 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 Dodecamethylpentasiloxane?

Yes. Every lot of Dodecamethylpentasiloxane 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 Dodecamethylpentasiloxane be shipped internationally?

Yes. Dodecamethylpentasiloxane 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.