235695

Octamethylcyclotetrasiloxane

98%

• Sinônimo(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
• Fórmula linear: [-Si(CH₃)₂O-]₄
• Número CAS: 556-67-2
• Peso molecular: 296.62
• Beilstein: 1787074
• Número CE: 209-136-7
• Número MDL: MFCD00003269
• Código UNSPSC: 12352103
• ID de substância PubChem: 24853994
• NACRES: NA.23

Propriedades

• densidade de vapor: 1 (vs air)
• Nível de qualidade: 200
• Ensaio: 98%
• forma: liquid
• índice de refração: n20/D 1.396 (lit.)
• pb: 175-176 °C (lit.)
• pf: 17-18 °C (lit.)
• densidade: 0.956 g/mL at 25 °C (lit.)
• cadeia de caracteres 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
• chave InChI: HMMGMWAXVFQUOA-UHFFFAOYSA-N

Descrição

Descrição geral

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.

Aplicação

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.

Informações de segurança

• Pictogramas: GHS02,GHS08,GHS09
• Palavra indicadora: Warning
• Frases de perigo: H226 - H361f - H410
• Declarações de precaução: P202 - P210 - P233 - P240 - P273 - P308 + P313
• Classificações de perigo: Aquatic Acute 1 - Aquatic Chronic 1 - Flam. Liq. 3 - Repr. 2
• Código de classe de armazenamento: 3 - Flammable liquids
• Classe de risco de água (WGK): WGK 3
• Ponto de fulgor (°F): 123.8 °F - closed cup
• Ponto de fulgor (°C): 51 °C - closed cup
• Equipamento de proteção individual: Eyeshields, Gloves, type ABEK (EN14387) respirator filter