CAS 556-67-2: Octamethylcyclotetrasiloxane

Applications Octamethylcyclotetrasiloxane, is an organometallic reagent , that can be used for the preparation of siloxane polymers, with high surface-hydrophobicity restoration. Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package References Fritz, O., et al.: MRS Online Proceedings Library, 1535 (2012); Vanossi, A., et al.: Condensed Matter (2013);

ALD Material Atomic layer deposition (ALD) is a chemically self-limiting deposition technique that is based on the sequential use of a gaseous chemical process. A thin film (as fine as -0.1 Å per cycle) results from repeating the deposition sequence as many times as needed to reach a certain thickness. The major characteristic of the films is the resulting conformality and the controlled deposition manner. Precursor selection is key in ALD processes, namely finding molecules which will have enough reactivity to produce the desired films yet are stable enough to be handled and safely delivered to the reaction chamber. Octamethylcyclotetrasiloxane; D4; Cyclic tetramer; Cyclomethicone; Cyclohexasiloxane; Cyclotetrasiloxane; OMCTS Viscosity: 2.3 cStΔHfus: 18.4 kJ/molΔHvap: 45.6 kJ/molDipole moment: 1.09 debyeVapor pressure, 23 °C: 1 mmDielectric constant: 2.39Ring strain: 1.00 kJ/molSurface tension, 20 °C: 17.9 mN/mCritical temperature: 314 °CCritical pressure: 1.03 mPaSpecific heat: 502 J/g/°Coefficient of thermal expansion: 0.8 x 10-3Cryoscopic constant: 11.2Henry’s law constant, Hc: 3.4 ± 1.7Ea, polym: 79 kJ/molOctanol/water partition coefficient, log Kow: 5.1Basic building block for silicones by ring-opening polymerizationSolubility, water: 50 ?g/l

Organo-inorganic compounds, nesoi

Octamethylcyclotetrasiloxane is used to prepare silicone oil, silicone rubber and silicone resin having different degrees of polymerization through ring opening and polymerizing. It is also widely used in various fields viz. construction, electronics, textile, automobile, personal care, food, and machining. It is an organometallic reagent utilized for the preparation of siloxane polymers having high surface-hydrophobicity restoration. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Octamethylcyclotetrasiloxane, 98%

Octamethylcyclotetrasiloxane is a chemical compound that consists of eight silicon atoms, eight methyl groups, and one oxygen atom. It has a molecular weight of 208.31 g/mol. Octamethylcyclotetrasiloxane is a liquid with low viscosity and high lubricity. It is also water-repellent and can be used in the treatment of wastewater. The main application of octamethylcyclotetrasiloxane is as a component in silicone oil emulsions to provide lubrication for textile machines, bearings, and gears. Octamethylcyclotetrasiloxane can be used to treat bacterial strains resistant to fatty acid synthesis inhibitors. This chemical may have an effect on the cell membrane by binding to the receptor binding site on the cell surface or by interacting with the fatty acid synthesis enzyme complex.

VDT-731: Vinylmethylsiloxane-Dimethylsiloxane Copolymer, TMS Terminated (Pendant Functional Fluid) Vinyl containing copolymers are used as crosslinkers in Pt and peroxide 2-part addition cure elastomers. VDT-731 Properties Viscosity: 800-1,200 cStMolecular Weight: 28,000 g/molVinyl (eq/kg): 0.9-1.1

This Thermo Scientific Chemicals brand product was originally part of the Acros Organics product portfolio. Some documentation and label information may refer to the legacy brand. The original Acros Organics product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Octamethylcyclotetrasiloxane

S12400 - Octamethylcyclotetrasiloxane