447269

Dodecamethylpentasiloxane

97%

• Synonym(s): 1,1,1,3,3,5,5,7,7,9,9,9-Dodecamethylpentasiloxane, DC 200 Fluid 2
• Linear Formula: (CH₃)₃SiO[Si(CH₃)₂O]₃Si(CH₃)₃
• CAS Number: 141-63-9
• Molecular Weight: 384.84
• EC Number: 205-492-2
• MDL number: MFCD00039795
• UNSPSC Code: 12352103
• PubChem Substance ID: 24868328
• NACRES: NA.22

Properties

• vapor pressure: <1 mmHg ( 20 °C)
• Assay: 97%
• refractive index: n20/D 1.392 (lit.)
• bp: 230 °C (lit.)
• mp: −81 °C (lit.)
• density: 0.875 g/mL at 25 °C (lit.)
• SMILES string: C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C
• InChI: 1S/C12H36O4Si5/c1-17(2,3)13-19(7,8)15-21(11,12)16-20(9,10)14-18(4,5)6/h1-12H3
• InChI key: FBZANXDWQAVSTQ-UHFFFAOYSA-N

Description

General description

Dodecamethylpentasiloxane is an organosilicon compound that is used as a reactant or as a solvent in organic synthesis. It is also used as a precursor compound to synthesize useful compounds, such as straight-chain linear polydimethylsiloxanes (PDMS), which are widely used in industrial applications such as coatings, adhesives, and elastomers.

Application

• Adsorption Characteristics of Dodecamethylpentasiloxane from Landfill Leachate: This study investigates the adsorption behavior of dodecamethylpentasiloxane in municipal solid waste, crucial for environmental chemists and waste management specialists (Q Kong et al., 2022).
• Toxicity of Silicone Oil: This research evaluates the cytotoxicity of liquid low molecular weight cyclosiloxanes including dodecamethylpentasiloxane, significant for drug discovery chemists considering silicone oil applications (Y Chen et al., 2021).
• Bioaccumulation of Volatile Methylsiloxanes: Review of how volatile methylsiloxanes like dodecamethylpentasiloxane bioaccumulate in aquatic ecosystems, useful for environmental scientists and regulatory bodies (F Bernardo et al., 2022).
• Solid MRI Contrast Agents: Describes the use of dodecamethylpentasiloxane as a contrast agent for in vivo oxygen sensing, relevant to biomedical research and materials science (VH Liu et al., 2014).
• Effective Removal of Methyl Siloxane by Sewage Sludge Microbes: Discusses biodegradation of dodecamethylpentasiloxane, pertinent for environmental chemists and waste treatment research (Y Wang et al., 2019).

Safety Information

• Storage Class Code: 10 - Combustible liquids
• WGK: WGK 3
• Flash Point(F): 186.8 °F - closed cup
• Flash Point(C): 86 °C - closed cup
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves