3081-07-0

Basic information

• Product Name: 1,7-Tetrasiloxanediol, 1,1,3,3,5,5,7,7-octamethyl-
• Synonyms: 1,7-Tetrasiloxanediol, 1,1,3,3,5,5,7,7-octamethyl-;1,1,3,3,5,5,7,7-octamethyl-7-tetrasiloxanediol;7-Tetrasiloxanediol, 1,1,3,3,5,5,7,7-octamethyl-1;Octamethyltetrasiloxane-1,7-diol;1,1,3,3,5,5,7,7-Octamethyl-2,4,6-trioxa-1,3,5,7-tetrasilaheptane-1,7-diol;1,1,3,3,5,5,7,7-Octamethylheptanetetrasiloxane-1,7-diol
• CAS NO: 3081-07-0
• Molecular Formula: C₈H₂₆O₅Si₄
• Molecular Weight: 314.63
• Mol File: 3081-07-0.mol
• Article Data: 2

Chemical Properties

• Melting Point: -5 °C
• Boiling Point: 267.2°Cat760mmHg
• Flash Point: 115.4°C
• Appearance: /
• Density: 0.99g/cm³
• Vapor Pressure: 0.00112mmHg at 25°C
• Refractive Index: 1.431
• Storage Temp.: Refrigerator, under inert atmosphere
• Solubility: Chloroform (Slightly), Methanol (Slightly)
• PKA: 13.34±0.53(Predicted)
• Stability: Moisture Sensitive
• CAS DataBase Reference: 1,7-Tetrasiloxanediol, 1,1,3,3,5,5,7,7-octamethyl-(CAS DataBase Reference)
• NIST Chemistry Reference: 1,7-Tetrasiloxanediol, 1,1,3,3,5,5,7,7-octamethyl-(3081-07-0)
• EPA Substance Registry System: 1,7-Tetrasiloxanediol, 1,1,3,3,5,5,7,7-octamethyl-(3081-07-0)

Safety Data

• Hazardous Substances Data: 3081-07-0(Hazardous Substances Data)

Usage

Uses

Octamethyl-1,7-tetrasiloxanediol can be used in the preparation of Silicone coated Celgard-2400 for the adhesion of canine platelets and leucocytes.

InChI:InChI=1/C8H26O5Si4/c1-14(2,9)11-16(5,6)13-17(7,8)12-15(3,4)10/h9-10H,1-8H3

Upstream product

• 2474-02-4 1,7-dichlorooctamethyltetrasiloxane 
• 67-56-1 methanol 
• 58434-69-8 N-phenyl-1,1,3,3,5,5,7,7-octamethyl-1,3,5,7-tetrasila-2-aza-4,6,8-trioxacyclooctane 

Downstream Products

• 72325-65-6 C₃₂H₇₀O₁₃Si₁₂ 
• 97577-38-3 C₃₂H₆₈Cl₂O₁₃Si₁₂ 
• 72325-68-9 C₃₆H₈₂O₁₅Si₁₄ 
• 97566-45-5 C₃₆H₈₀Cl₂O₁₅Si₁₄ 
• 97566-43-3 C₃₂H₆₈Cl₂O₁₃Si₁₂ 
• 72325-64-5 2-Chloro-4,4,6,6,8,8,10,10-octamethyl-2-phenyl-[1,3,5,7,9,2,4,6,8,10]pentoxapentasilecane 

Relevant articles and documents

Rate studies of the acid-catalyzed solvolysis of eight-membered cyclosilazoxanes

The solvolysis of N-phenyl-1,1,3,3,5,5,7,7-octamethyl-1,3,5,7-tetrasila-2-aza-4,6,8-trioxacyclooctane (1) and N,N'-diphenyl-1,1,3,3,5,5,7,7-octamethyl-1,3,5,7-tetrasila-2,6-diaza-4,8-dioxacyclooctane (II) in methanol/water in the presence of an acetate buffer is a pseudo-first-order process, subject to general acid-catalysis.The catalytic rate constants have been determined spectrophotometrically for the solvolysis of I.The ring cleavage is slower than that of analogous six-membered cyclosilazoxanes, but the catalytic mode and the solvent isotope effect indicate a close mechanistic similarity between the solvolyses of six- and eight-membered rings.