18001-60-0

Basic information

• Product Name: 1,1,3,3-TETRAETHOXY-1,3-DIMETHYLDISILOXANE
• Synonyms: 1,1,3,3-TETRAETHOXY-1,3-DIMETHYLDISILOXANE;Tetraethoxydimethyldisiloxa;Disiloxane, 1,1,3,3-tetraethoxy-1,3-dimethyl-;1,1,3,3-TETRAETHOXY-1,3-DIMETHYLDISILOXANE 95%;1,1,3,3-Tetraethoxy-1,3-dimethylpropanedisiloxane;1,3-Dimethyl-1,1,3,3-tetraethoxypropanedisiloxane
• CAS NO: 18001-60-0
• Molecular Formula: C₁₀H₂₆O₅Si₂
• Molecular Weight: 282.48
• EINECS: 241-915-7
• Mol File: 18001-60-0.mol

Chemical Properties

• Boiling Point: 205 °C
• Flash Point: 58°C
• Appearance: /
• Density: 0.953
• Vapor Pressure: 0.117mmHg at 25°C
• Refractive Index: 1.3912
• CAS DataBase Reference: 1,1,3,3-TETRAETHOXY-1,3-DIMETHYLDISILOXANE(CAS DataBase Reference)
• NIST Chemistry Reference: 1,1,3,3-TETRAETHOXY-1,3-DIMETHYLDISILOXANE(18001-60-0)
• EPA Substance Registry System: 1,1,3,3-TETRAETHOXY-1,3-DIMETHYLDISILOXANE(18001-60-0)

Safety Data

• Statements: 36/37/38
• Safety Statements: 26-36/37/39
• RIDADR: 1993
• TSCA: No
• Hazardous Substances Data: 18001-60-0(Hazardous Substances Data)

Usage

Uses

Used in Chemical Industry:
1,1,3,3-Tetraethoxy-1,3-dimethyldisiloxane is used as a reagent for the production of siloxane polymers, which are versatile materials with various applications.
Used in Sealant Production:
1,1,3,3-Tetraethoxy-1,3-dimethyldisiloxane is used as a component in the formulation of sealants, contributing to their adhesive and flexible properties.
Used in Adhesive Production:
1,1,3,3-TETRAETHOXY-1,3-DIMETHYLDISILOXANE is used as a component in adhesives, enhancing their bonding capabilities and durability.
Used in Lubricant Production:
1,1,3,3-Tetraethoxy-1,3-dimethyldisiloxane is used in the formulation of lubricants, providing them with improved thermal stability and reducing friction.
Used in Biomedical Devices:
1,1,3,3-TETRAETHOXY-1,3-DIMETHYLDISILOXANE is used in the development of certain biomedical devices, such as implants, due to its biocompatibility and low toxicity.
However, it is important to note that exposure to 1,1,3,3-Tetraethoxy-1,3-dimethyldisiloxane in large quantities can be harmful to the eyes and skin, and can also potentially cause respiratory problems. Proper safety measures should be taken when handling 1,1,3,3-TETRAETHOXY-1,3-DIMETHYLDISILOXANE.

InChI:InChI=1/C10H26O5Si2/c1-7-11-16(5,12-8-2)15-17(6,13-9-3)14-10-4/h7-10H2,1-6H3

Upstream product

• 107-46-0 Hexamethyldisiloxane 
• 2031-67-6 Methyltriethoxysilan 
• 64-17-5 ethanol 
• 220289-00-9 1,1,3,3-tetraisocyanato-1,3-dimethyldisiloxane 
• 75-79-6 Methyltrichlorosilane 
• 124-38-9 carbon dioxide 
• 127177-29-1 sodium diethoxy(methyl)silanolate 
• 2031-62-1 diethoxymethylane 

Downstream Products

• 2031-67-6 Methyltriethoxysilan 

Relevant articles and documents

Interaction of organodialkoxysilanolates with carbon dioxide

A series of organo(alkoxy)disiloxanes was obtained by the reaction of carbon dioxide with sodium alkoxy(organo)silanolates under high pressure as well as by bubbling CO2 through the reaction mixture. It has been suggested that the reaction involves the intermediate formation of carbonate derivatives of sodium alkoxy(organo)silanolates.

Syntheses and properties of isocyanatodisiloxanes and their alkoxy- substituted derivatives

Isocyanatooligosiloxanes and their alkoxy derivatives were synthesized. The hydrolysis of triisocyanato(methyl)silane followed by distillation provided 1,1,3,3-tetraisocyanato-1,3-dimethyldisiloxane in good yield. The reaction of 1,1, 3,3-tetraisocyanato-1,3-dimethyldisiloxane with ethanol, isopropyl alcohol, and t-butyl alcohol proceeded selectively to afford partially alkoxy substituted isocyanatodimethyldisiloxanes, (RO)n(NCO)(4- n)Me2Si2O (R = Et, n = 1 - 4; R = Pr(i), n = 1 - 4; and R = Bu(t), n = 1 - 2). On the other hand, the hydrolysis of tetraisocyanatosilane provided a mixture of isocyanatooligosiloxanes. Hexaisocyanatodisiloxane was isolated by distillation from the reaction mixture with some impurities produced by the disproportionation of hexaisocyanatodisiloxane on heating. The reaction of hexaisocyanatodisiloxane with alcohols provided partially alkoxy-substituted isocyanatodisiloxanes, [(RO)(n)(NCO)(3-n)Si]2O (R = Et, n = 2-3; R = Pr(i), n = 1 - 3; and R = Bu(t), n = 1 - 2), selectively and in high yield.

Sustainable Catalytic Synthesis of Diethyl Carbonate

New sustainable approaches should be developed to overcome equilibrium limitation of dialkyl carbonate synthesis from CO2 and alcohols. Using tetraethyl orthosilicate (TEOS) and CO2 with Zr catalysts, we report the first example of sustainable catalytic synthesis of diethyl carbonate (DEC). The disiloxane byproduct can be reverted to TEOS. Under the same conditions, DEC can be synthesized using a wide range of alkoxysilane substrates by investigating the effects of the number of ethoxy substituent in alkoxysilane substrates, alkyl chain, and unsaturated moiety on the fundamental property of this reaction. Mechanistic insights obtained by kinetic studies, labeling experiments, and spectroscopic investigations reveal that DEC is generated via nucleophilic ethoxylation of a CO2-inserted Zr catalyst and catalyst regeneration by TEOS. The unprecedented transformation offers a new approach toward a cleaner route for DEC synthesis using recyclable alkoxysilane.

Diffusion pump oil synthesis method

The invention relates to the chemical industry field, particularly to a diffusion pump oil synthesis method, which specifically comprises: (1) carrying out a hydrolysis reaction on methyl triethoxysilane to obtain 1,3-dimethyl-1,1,3,3-tetraethoxydisiloxane (short for compound B); (2) under a strong alkali condition, carrying out balanced telomerization on the compound B and a dimethyl ring body or methylphenyl ring body to obtain a compound D; (3) carrying out a sodium condensation reaction on the compound D, chlorobenzene and sodium to obtain the diffusion pump oil. According to the present invention, the reaction order is re-combined, and the method has advantages of low energy consumption and environmentally friendly process compared to the method in the prior art.

Br?nsted acid-promoted formation of stabilized silylium ions for catalytic friedel-crafts C-H silylation

A counterintuitive approach to electrophilic aromatic substitution with silicon electrophiles is disclosed. A strong Br?nsted acid that would usually promote the reverse reaction, i.e., protodesilylation, was found to initiate the C-H silylation of electron-rich (hetero)arenes with hydrosilanes. Protonation of the hydrosilane followed by liberation of dihydrogen is key to success, fulfilling two purposes: to generate the stabilized silylium ion and to remove the proton released from the Wheland intermediate.

Treatment of alkyltriethoxysilanes with Amberlyst 15 cation-exchange resin in the presence of hexamethyldisiloxane

Methyltriethoxysilane and ethyltriethoxysilane were treated with Amberlyst 15 cation-exchange resin in the presence of hexamethyldisiloxane at 40 deg C.The reaction involves partial or full replacement of the ethoxyl group by trimethylsiloxyl to give RSi(OEt)n(OSiMe3)3-n (n=0, 1, 2).The degree of substitution depends mainly on the ratio in which hexamethyldisiloxane and alkyltriethoxysilane are mixed.The nature of alkyl group in an alkyltriethoxysilane had little effect on the degree of substitution at a given mixing ratio.