Cyclotetrasiloxane,2,2,4,4,6,6,8-heptamethyl-

Cyclotetrasiloxane,2,2,4,4,6,6,8-heptamethyl- - Names and Identifiers

Name	Heptamethyl Cyclotetrasiloxane
Synonyms	heptamethyl-cyclotetrasiloxan Heptamethyl Cyclotetrasiloxane HEPTAMETHYL CYCLOTETRASILOXANE HEPTAMETHYLCYCLOTETRASILOXANE, tech-95 Cyclotetrasiloxane,2,2,4,4,6,6,8-heptamethyl- 2,2,4,4,6,6,8-heptamethyl-1,3,5,7,2,4,6,8-tetroxatetrasilocane 2,2,4,4,6,6,8-heptamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane 2,2,4,4,6,6,8-heptamethyl-1,3,5,7,2,4,6,8λ3-tetraoxatetrasilocane 2,4,4,6,6,8,8-heptamethyl-1,3,5,7,2,4,6,8-tetroxatetrasilocan-2-yl 2,2,4,4,6,6,8-heptamethyl-1,3,5,7,2,4,6,8λsup3sup-tetraoxatetrasilocane
CAS	15721-05-8
InChI	InChI=1/C7H21O4Si4/c1-12-8-13(2,3)10-15(6,7)11-14(4,5)9-12/h1-7H3

Cyclotetrasiloxane,2,2,4,4,6,6,8-heptamethyl- - Physico-chemical Properties

Molecular Formula	C7H22O4Si4
Molar Mass	282.59
Density	0,958 g/cm3
Melting Point	-27°C
Boling Point	165°C
Flash Point	46°C
Solubility	Chloroform (Slightly), Methanol (Slightly)
Appearance	liquid
Specific Gravity	0.958
Color	Clear Colourless
Storage Condition	Refrigerator
Sensitive	3: reacts with aqueous base
Refractive Index	1.3965

Cyclotetrasiloxane,2,2,4,4,6,6,8-heptamethyl- - Risk and Safety

Risk Codes	10 - Flammable
Safety Description	16 - Keep away from sources of ignition.
UN IDs	1993
TSCA	No

Cyclotetrasiloxane,2,2,4,4,6,6,8-heptamethyl- - Introduction

The chemical formula C7H22O2Si4, also known as TMOS (tetraethyl orthosilicate), is an organic silicon compound.

Nature:
1. Appearance: colorless liquid.
2. Density: about 0.98 g/cm.
3. Melting Point: About -68 ° C.
4. Boiling Point: about 170-172 ° C.
5. Solubility: Soluble in organic solvents (such as alcohols, ethers), insoluble in water.

Use:
1. Chemical Synthesis: Heptamethyl cyclotetrasilane can be used as a raw material for the synthesis of organosilicon compounds and silicon heterocyclic compounds.
2. Silicone rubber preparation: As a crosslinking agent and a curing agent for silicone rubber, it is used to prepare silicone rubber.
3. Artificial stone manufacturing: can be used as an artificial stone enhancer to improve the hardness and durability of the stone.

Method:
The preparation method of Heptamethyl Cyclotetrasiloxane is mainly prepared by the reaction of methylated magnesium silicide, and the specific steps are as follows:
1. Chloromethane and chlorosilane are mixed and reacted at low temperature to generate methyl compounds.
2. Mix methyl compound with silica powder, and then react with solid magnesium chloride to generate Heptamethyl cyclotetrasilane.

Safety Information:
1. The vapor of Heptamethyl cyclotetrasilane is irritating, so pay attention to avoid inhalation.
2. Use should wear appropriate protective equipment, such as gloves and goggles.
3. Avoid contact with skin and eyes, such as contact should immediately rinse with water.
4. Try to use in a well-ventilated place.
5. Storage should be sealed, stored in a cool, dry place.

Last Update：2024-04-10 22:29:15