十二甲基五硅氧烷

Description

Dodecamethylpentasiloxane · CAS 141-63-9 · C12H36O4Si5. UNII 0QDQ2VQ5YJ. Boiling Point: 230 °C; Boiling Point: BP: 229 °C at 710 mm Hg; Melting Point: -80 °C.

Identification

CAS Registry Number	141-63-9
PubChem CID	8853
Molecular formula	C12H36O4Si5
IUPAC name	bis[[dimethyl(trimethylsilyloxy)silyl]oxy]-dimethylsilane
UNII (FDA)	0QDQ2VQ5YJ

Computed Descriptors

Molecular Weight	384.84
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	8
Exact Mass	384.14599230
Monoisotopic Mass	384.14599230
Topological Polar Surface Area	36.9
Heavy Atom Count	21
Formal Charge	0
Complexity	313

Physical & Chemical Properties

Boiling Point	230 °C
Boiling Point	BP: 229 °C at 710 mm Hg
Melting Point	-80 °C
Solubility	In water, 7.04X10-5 mg/L at 25 °C
Density	0.8755 g/cu cm at 20 °C
LogP	log Kow = 9.41
Heat of Vaporization	50.3 kJ/mol

Physical description & handling notes

• Liquid
• Liquid; [Merck Index] Colorless odorless liquid; [Acros Organics MSDS]
• Colorless liquid
• Soluble in carbon tetrachloride, carbon disulfide
• Soluble in benzene and higher hydrocarbons; slightly soluble in alcohol and the heavy hydrocarbons
• 4.50X10-2 mm Hg at 25 °C (extrapolated)

Regulatory Status

GHS notification summary	58.5% (203 / 347)

GHS Hazard Classification

GHS notification summary	58.5% (203 / 347)
Reported hazard statements	H315 (11.5%), H319 (11.5%), H335 (11.5%), H413 (30%), H227

Documented Uses

• Used in extreme-temperature silicone oils/fluids and to suppress foam in petroleum oils; [Merck Index] Used to formulate cosmetics and personal care products, in lubricants, greases, and release agents, to make rubber and plastic products, in non-metal surface treatments, and as a laboratory reagent; [ExPub: ECHA REACH Registrations]
• As a basis for silicone oils or fluids designed to withstand extremes of temperature; as a foam suppressant in petroleum lubricating oil.
• Not Known or Reasonably Ascertainable
• Information on 7 consumer products that contain Dodecamethylpentasiloxane in the following categories is provided:
• 2023: 1,000,000 - <2,500,000 lb
• 2022: 2,500,000 - <4,000,000 lb

Synonyms

DODECAMETHYLPENTASILOXANE; 1,1,1,3,3,5,5,7,7,9,9,9-Dodecamethylpentasiloxane; Pentasiloxane, dodecamethyl-; 0QDQ2VQ5YJ; BRN 1792965; UNII-0QDQ2VQ5YJ; EINECS 205-492-2; HSDB 8419; Pentasiloxane, 1,1,1,3,3,5,5,7,7,9,9,9-dodecamethyl-; DTXSID1044803; CHEBI:84272; EC 205-492-2; PENTASILOXANE, DODECAMETHYL; 4-04-00-04124 (Beilstein Handbook Reference); DODECAMETHYLPENTASILOXANE [MI]; Silicone liquid

Frequently Asked Questions

What are the CAS number and molecular formula of Dodecamethylpentasiloxane?

CAS 141-63-9; molecular formula C12H36O4Si5; molecular weight — g/mol.

What other names is Dodecamethylpentasiloxane known by?

DODECAMETHYLPENTASILOXANE, 1,1,1,3,3,5,5,7,7,9,9,9-Dodecamethylpentasiloxane, Pentasiloxane, dodecamethyl-, 0QDQ2VQ5YJ, BRN 1792965, UNII-0QDQ2VQ5YJ.

Is Dodecamethylpentasiloxane classified as hazardous?

58.5% of GHS notifications report no hazard classification (203 of 347).

What are the key physical properties of Dodecamethylpentasiloxane?

Boiling Point: 230 °C; Boiling Point: BP: 229 °C at 710 mm Hg; Melting Point: -80 °C; Solubility: In water, 7.04X10-5 mg/L at 25 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.