2895-07-0

Basic information

• Product Name: 1,1,1,3,3,5,5-HEPTAMETHYLTRISILOXANE
• Synonyms: 1,1,1,3,3,5,5-HEPTAMETHYLTRISILOXANE;1,1,1,3,3,5,5-HEPTAMETHYLTRISILOXANE 90%;1,1,1,3,3,5,5-Heptamethylpentanetrisiloxane;1,1,3,3,5,5,5-Heptamethylpentanetrisiloxane;Trisiloxane,1,1,1,3,3,5,5-heptamethyl-
• CAS NO: 2895-07-0
• Molecular Formula: C₇H₂₂O₂Si₃
• Molecular Weight: 222.5
• EINECS: 220-774-5
• Mol File: 2895-07-0.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 134 °C
• Flash Point: 21°C
• Appearance: /
• Density: 0.82
• CAS DataBase Reference: 1,1,1,3,3,5,5-HEPTAMETHYLTRISILOXANE(CAS DataBase Reference)
• NIST Chemistry Reference: 1,1,1,3,3,5,5-HEPTAMETHYLTRISILOXANE(2895-07-0)
• EPA Substance Registry System: 1,1,1,3,3,5,5-HEPTAMETHYLTRISILOXANE(2895-07-0)

Safety Data

• Statements: 10-36/37/38
• Safety Statements: 16-33-36/37/39
• RIDADR: 1993
• TSCA: No
• HazardClass: 3.1
• PackingGroup: II
• Hazardous Substances Data: 2895-07-0(Hazardous Substances Data)

Usage

General Description

1,1,1,3,3,5,5-Heptamethyltrisiloxane is a chemical compound that belongs to the siloxane family. It is a clear, colorless, and odorless liquid that is insoluble in water but soluble in organic solvents. 1,1,1,3,3,5,5-HEPTAMETHYLTRISILOXANE is commonly used as a lubricant, anti-foaming agent, and in the production of silicone polymers and elastomers. It is also used as a spreading and wetting agent in various industrial processes and as a release agent in molding and casting applications. 1,1,1,3,3,5,5-Heptamethyltrisiloxane is considered to have low toxicity and is generally considered to be safe for use in these applications.

InChI:InChI=1/C7H21O2Si3/c1-10(2)8-12(6,7)9-11(3,4)5/h1-7H3

Upstream product

• 1438-82-0 1,1,1,3,3-pentamethyl-1,3-disiloxane 
• 75-77-4 chloro-trimethyl-silane 
• 1112-39-6 dimethyldimethoxysilan 

Downstream Products

• 956255-98-4 C₆₁H₈₄O₁₁Si₃ 
• 1185417-85-9 2-methyl-1,3-phenylene bis(4-{4-[11-(1,1,3,3,5,5,5-heptamethyltrisiloxane-1-yl)undec-1-yloxy]phenoxycarbonyl}benzoate) 
• 1416739-48-4 C₃₁H₆₂O₁₀Si₆ 
• 1419729-78-4 C₂₁H₃₇BO₈Si₃ 
• 1419729-72-8 C₂₁H₃₇BO₈Si₃ 
• 1419730-19-0 C₁₅H₃₁BO₄Si₃ 
• 1419730-24-7 C₁₅H₃₁BO₄Si₃ 

Relevant articles and documents

1,1,1,3,3,5,5-heptamethyltrisiloxane preparation method

The present invention discloses a 1,1,1,3,3,5,5-heptamethyltrisiloxane preparation method, wherein 1,1,1,3,3,3-hexamethyldisiloxane and 1,1,3,3-tetramethyldisiloxane are subjected to co-hydrolysis for 1-4 h under catalysis of concentrated sulfuric acid to obtain 1,1,1,3,3-pentamethyldisiloxane, the 1,1,1,3,3-pentamethyldisiloxane and dimethyl dimethoxy silicane are subjected to co-hydrolysis for 1-3 h under catalysis of concentrated sulfuric acid, rectification is performed, and the distillate at a temperature of 135 DEG C is collected so as to obtain the 1,1,1,3,3,5,5-heptamethyltrisiloxane product. According to the present invention, the method has characteristics of strong target property, less by-product content in the product, and easy separation.

METAL COMPLEX-CATALYZED REDISTRIBUTION REACTIONS OF ORGANOSILANES. IV. REDISTRIBUTION REACTIONS OF METHYLSILOXANES CATALYZED BY TRANSITION METAL COMPLEXES

Redistribution reactions of a variety of hydrogen-substituted siloxanes are catalyzed by various transition metal complexes of iridium and rhodium.The products arise from breaking and remaking of Si-C, Si-H, and Si-O bonds.Siloxanes not possessing a Si-H bond are inert under the conditions studied.The most favored reaction pathway appears to scramble preferentially the groups directly attached to the silicon bearing the hydrogen atom.A new cyclo-iridiadisiloxane, (L = Ph3P; R = Me3SiO) is reported.This compound exists in three isomeric forms as a consequence of the spatial arrangements of the R and Me groups on the ring.