Trisiloxane, 3-ethenyl-1,1,1,3,5,5,5-heptamethyl-

Trisiloxane, 3-ethenyl-1,1,1,3,5,5,5-heptamethyl- - Names and Identifiers

Name	Vinylmethylbis(trimethylsiloxy)silane
Synonyms	Heptamethyl-3-vinyltrisiloxane 3-VINYL HEPTAMETHYL TRISILOXANE VINYLMETHYLBIS(TRIMETHYLSILOXY)SILANE Vinylmethylbis(trimethylsiloxy)silane METHYLBIS(TRIMETHYLSILYLOXY)VINYLSILANE VINYLMETHYLBIS(TRIMETHYLSILYLOXY)SILANE VINYLMETHYLBIS-(TRIMETHYLSILYLOXY)-SILAN 1,1,1,3,5,5,5-HEPTAMETHYLVINYLTRISILOXANE [BIS-(TRIMETHYLSILYLOXY)-METHYLSILYL]-ETHEN 3-ethenyl-1,1,1,3,5,5,5-heptamethyltrisiloxane Trisiloxane, 3-ethenyl-1,1,1,3,5,5,5-heptamethyl-
CAS	5356-85-4
InChI	InChI=1/C9H24O2Si3/c1-9-14(8,10-12(2,3)4)11-13(5,6)7/h9H,1H2,2-8H3

Trisiloxane, 3-ethenyl-1,1,1,3,5,5,5-heptamethyl- - Physico-chemical Properties

Molecular Formula	C9H24O2Si3
Molar Mass	248.54
Density	0.864 g/mL at 25 °C (lit.)
Boling Point	48 °C/8.8 mmHg (lit.)
Flash Point	124°F
Vapor Presure	0.564mmHg at 25°C
Specific Gravity	0.864
Storage Condition	Flammables area
Sensitive	1: no significant reaction with aqueous systems
Refractive Index	n20/D 1.397(lit.)

Trisiloxane, 3-ethenyl-1,1,1,3,5,5,5-heptamethyl- - Risk and Safety

Hazard Symbols	Xi - Irritant
Risk Codes	R10 - Flammable R36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description	S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing.
UN IDs	UN 1993 3/PG 3
WGK Germany	3
TSCA	Yes
HS Code	29310099

Trisiloxane, 3-ethenyl-1,1,1,3,5,5,5-heptamethyl- - Introduction

Vinylmethylbis(trimethylsiloxy)silane, also known as VMMS, is an organosilicon compound.

Nature:
-Appearance: Colorless or light yellow liquid
-Molecular formula: C9H24O2Si3
-Molecular weight: 248.56g/mol
-Density: 0.873g/cm3
-Boiling Point: 170-180°C
-Melting point:-90°C
-Refractive Index: 1.426

Use:
VMMS is mainly used for the preparation of modified silicone materials, such as silicone rubber, silicone rubber moldshell mold (RTV), coatings, adhesives, etc. It can be used as a crosslinking agent, plasticizer, silane coupling agent and other functional additives, and can improve the material's heat resistance, chemical resistance, bonding properties and anti-aging properties.

Preparation Method:
VMMS is typically prepared by the reaction of vinyl iodide and trimethylchlorosilane. In a specific step, vinyl iodide and trimethylchlorosilane are subjected to an addition reaction in the presence of an organic solvent to produce Vinylmethylbis(trimethylsiloxy)silane.

Safety Information:
VMMS may be irritating to the eyes, skin and respiratory system. Use appropriate protective measures, such as goggles, protective gloves and protective masks. Use with adequate ventilation and avoid inhalation, ingestion or contact with skin. In case of accidental contact, rinse immediately with plenty of water and seek medical help.

Last Update：2024-04-10 22:29:15