[(CH3)3SiO]2Si(CH3)2

[(CH3)3SiO]2Si(CH3)2 - Names and Identifiers

Name	Octamethyltrisiloxane
Synonyms	CO9816 CCRIS 3198 METHYLPOLYSILOXANE [(CH3)3SiO]2Si(CH3)2 OCTAMETHYLTRISILOXANE Octamethyltrisiloxane Trisiloxane, octamethyl- POLY(DIMETHYLSILOXANE), 200(R) FLUID DIMETHYLBIS(TRIMETHYLSILYLOXY)SILANE 1,1,1,3,3,5,5,5-Octamethyltrisiloxane Trisiloxane, 1,1,1,3,3,5,5,5-octamethyl- POLY(DIMETHYLSILOXANE), HYDROXY TERMINATED
CAS	107-51-7
EINECS	203-497-4
InChI	InChI=1/C8H24O2Si3/c1-11(2,3)9-13(7,8)10-12(4,5)6/h1-8H3

[(CH3)3SiO]2Si(CH3)2 - Physico-chemical Properties

Molecular Formula	C8H24O2Si3
Molar Mass	236.53
Density	0.82 g/mL at 25 °C (lit.)
Melting Point	-82 °C (lit.)
Boling Point	153 °C (lit.)
Flash Point	99°F
Water Solubility	34μg/L at 23℃
Solubility	Chloroform (Slightly), DMSO, Methanol (Slightly)
Vapor Presure	5.3hPa at 25℃
Vapor Density	>1 (vs air)
Appearance	liquid
Specific Gravity	0.82
Color	Colourless to Pale Yellow
Merck	14,6748
BRN	1753063
Storage Condition	Inert atmosphere,Room Temperature
Stability	Hygroscopic
Sensitive	1: no significant reaction with aqueous systems
Refractive Index	n20/D 1.384(lit.)

[(CH3)3SiO]2Si(CH3)2 - Risk and Safety

Risk Codes	10 - Flammable
Safety Description	S23 - Do not breathe vapour. S24/25 - Avoid contact with skin and eyes.
UN IDs	UN 1993 3/PG 3
WGK Germany	3
FLUKA BRAND F CODES	10-21
TSCA	Yes
HS Code	29319090
Hazard Class	3.2
Packing Group	III

[(CH3)3SiO]2Si(CH3)2 - Reference Information

LogP	6.6 at 25.3℃
EPA chemical substance information	information provided by: ofmpeb.epa.gov (external link)
trait	transparent colorless liquid
preparation	synthesis of polyether-modified polysiloxane copolymer the hydrogen-containing silicone oil was condensed and grafted with Polyether under the action of catalyst by condensation method. In a four-port flask equipped with a stirrer, condenser, thermometer and hydrogen gas discharge device, add hydrogen-containing silicone oil, Polyether, solvent and catalyst in proportion, start the stirrer and slowly heat to a certain temperature, at this time, hydrogen gas escapes to generate bubbles. When the conversion rate reaches a certain value, the temperature is lowered, the alkali is added for neutralization, and the residual catalyst and solvent are removed by Suction filtration and vacuum distillation to obtain the polyether-modified polysiloxane copolymer. Octamethyltrisiloxane was prepared by nitrile condensation reaction using polydimethylsiloxane and octamethylcyclotetrasiloxane as starting materials.

Last Update：2024-04-09 21:04:16

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[(CH3)3SiO]2Si(CH3)2

Octamethyltrisiloxane

CAS: 107-51-7

Molecular Formula: C8H24O2Si3

[(CH3)3SiO]2Si(CH3)2 - Names and Identifiers

[(CH3)3SiO]2Si(CH3)2 - Physico-chemical Properties

[(CH3)3SiO]2Si(CH3)2 - Risk and Safety

[(CH3)3SiO]2Si(CH3)2 - Reference Information

Supplier List

[(CH3)3SiO]2Si(CH3)2 Request for Quotation

Octamethyltrisiloxane

CAS: 107-51-7

Molecular Formula: C8H24O2Si3

[(CH3)3SiO]2Si(CH3)2 - Names and Identifiers

[(CH3)3SiO]2Si(CH3)2 - Physico-chemical Properties

[(CH3)3SiO]2Si(CH3)2 - Risk and Safety

[(CH3)3SiO]2Si(CH3)2 - Reference Information

Supplier List

[(CH3)3SiO]2Si(CH3)2