235695

Octamethylcyclotetrasiloxane

98%

• Synonyme(s) : 2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane, octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane
• Formule linéaire : [-Si(CH₃)₂O-]₄
• CAS Number: 556-67-2
• Poids moléculaire : 296.62
• Beilstein: 1787074
• Numéro CE : 209-136-7
• Numéro MDL: MFCD00003269
• Code UNSPSC : 12352103
• ID de substance PubChem : 24853994
• Nomenclature NACRES : NA.23

Propriétés

• Densité de vapeur: 1 (vs air)
• Niveau de qualité: 200
• Essai: 98%
• Forme: liquid
• Indice de réfraction: n20/D 1.396 (lit.)
• pb: 175-176 °C (lit.)
• Pf: 17-18 °C (lit.)
• Densité: 0.956 g/mL at 25 °C (lit.)
• Chaîne SMILES: C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1
• InChI: 1S/C8H24O4Si4/c1-13(2)9-14(3,4)11-16(7,8)12-15(5,6)10-13/h1-8H3
• Clé InChI: HMMGMWAXVFQUOA-UHFFFAOYSA-N

Description

Description générale

Octamethylcyclotetrasiloxane (D4) is a volatile methylsiloxane (VMS) with a relatively low molecular weight. This silicone fluid has a silicon-oxygen bond in a cyclic arrangement and methyl groups are attached to the silicon atom. D4 can be used in the manufacture of silicone based polymers for use in medical devices and personal care products.

Application

D4 can be polymerized through ring opening mechanism with a rare earth solid super acid as a catalyst for potential usage in the synthesis of vinyl coated polydimethylsiloxane (PDMS). It may also be used as a probe liquid for nuclear magnetic resonance cryoporometry (NMRC) to analyze the pore size distribution (PSD) of oil-bearing tight sandstone. Chemical vapor deposition (CVD) of D4 may be utilized for the preparation of siloxane based thin films.

Informations sur la sécurité

• Pictogrammes: GHS02,GHS08,GHS09
• Mention d'avertissement: Warning
• Mentions de danger: H226,H361f,H410
• Conseils de prudence: P202 - P210 - P233 - P240 - P273 - P308 + P313
• Classification des risques: Aquatic Acute 1 - Aquatic Chronic 1 - Flam. Liq. 3 - Repr. 2
• Code de la classe de stockage: 3 - Flammable liquids
• Classe de danger pour l'eau (WGK): WGK 3
• Point d'éclair (°F): 123.8 °F - closed cup
• Point d'éclair (°C): 51 °C - closed cup
• Équipement de protection individuelle: Eyeshields, Gloves, type ABEK (EN14387) respirator filter