107-51-7 Usage
Description
POLY(DIMETHYLSILOXANE), HYDROXY TERMINATED is an organosilicon compound, specifically a siloxane-based elastomer known as dimethicone. It is characterized by its hydrophobic nature and possesses a range of attractive physical and chemical properties, including elasticity, optical transparency, tunable surface chemistry, and low electrical conductivity. The hydroxy-terminated version of this polymer has additional reactive sites that can be utilized for various applications.
Uses
Used in Pharmaceutical and Cosmetic Applications:
POLY(DIMETHYLSILOXANE), HYDROXY TERMINATED is used as an excipient in the pharmaceutical and cosmetic industries. It provides a long-lasting lubricant, a smooth feel, and spreads easily, making it an ideal ingredient for these products. Additionally, it has been shown to maintain the conformational stability of certain adsorbed proteins, such as bovine serum albumin (BSA), which can be beneficial for the formulation and stability of pharmaceutical products.
Used in Chemical Synthesis:
In the chemical industry, POLY(DIMETHYLSILOXANE), HYDROXY TERMINATED can be used as a starting material for the synthesis of various siloxane-based products. Its reactive hydroxy-terminated groups can be further functionalized or used in the formation of copolymers, offering a wide range of possibilities for the development of new materials and applications.
Used in Silicone Oils or Fluids:
POLY(DIMETHYLSILOXANE), HYDROXY TERMINATED serves as a basis for silicone oils or fluids that are designed to withstand extreme temperatures. Its unique properties, such as low electrical conductivity and tunable surface chemistry, make it an ideal candidate for applications where temperature resistance and stability are crucial.
Used as a Foam Suppressant:
In the petroleum industry, POLY(DIMETHYLSILOXANE), HYDROXY TERMINATED can be utilized as a foam suppressant in petroleum lubricating oil. Its ability to control foam formation can help improve the performance and longevity of lubricants, reducing the risk of equipment failure and maintenance issues.
Used in the Methylation of Mercury(II) Salts:
POLY(DIMETHYLSILOXANE), HYDROXY TERMINATED can also be employed in the methylation of mercury(II) salts, which is an important chemical process with various applications in the field of environmental chemistry and toxicology. The hydroxy-terminated groups in the polymer can facilitate the methylation process, leading to the formation of organomercury compounds that can be further studied or utilized for specific purposes.
Flammability and Explosibility
Flammable
Purification Methods
Distil it twice, the middle fraction from the first distillation is again distilled, and the middle fraction of the second distillation is used. [Patnode & Wilcock J Am Chem Soc 68 358, Wolcock J Am Chem Soc 68 691 1946, Thompson J Chem Soc 1908 1953, Beilstein 4 IV 4115.]
Check Digit Verification of cas no
The CAS Registry Mumber 107-51-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,0 and 7 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 107-51:
(5*1)+(4*0)+(3*7)+(2*5)+(1*1)=37
37 % 10 = 7
So 107-51-7 is a valid CAS Registry Number.
InChI:InChI=1/C8H24O2Si3/c1-11(2,3)9-13(7,8)10-12(4,5)6/h1-8H3
107-51-7Relevant articles and documents
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Tamao,K. et al.
, p. 367 - 376 (1975)
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Pd/C-catalyzed cross-coupling reaction of benzyloxysilanes with halosilanes for selective synthesis of unsymmetrical siloxanes
Igarashi, Masayasu,Kubo, Keiko,Matsumoto, Tomohiro,Sato, Kazuhiko,Ando, Wataru,Shimada, Shigeru
, p. 19099 - 19102 (2014)
A new protocol for the nonhydrolytic synthesis of unsymmetrical siloxanes has been developed. The cross-coupling reaction of benzyloxysilanes with halosilanes catalyzed by Pd/C afforded various unsymmetrical siloxanes with co-production of benzyl halides. the Partner Organisations 2014.
Siloxanes as sources of silanones
Chernyshev,Krasnova,Sergeev,Abramova
, p. 1586 - 1589 (1997)
Pyrolysis of hexamethyldisiloxane (HMDS) and its copyrolysis with chlorotrimethylsilane and tetrachlorosilane were studied. Based on the data of GLC analysis and on the mass spectrum of the condensate obtained after the pyrolysis of HMDS, it was concluded that HMDS acts as a source of dimethylsilanone. The results of the copyrolysis of HMDS with chlorotrimethylsilane used as a trapping reagent indicate that the dimethylsilanone generated from HMDS can be inserted into the Si-Cl and Si-O bonds. In the copyrolysis of HMDS with tetrachlorosilane serving as a trapping reagent for dimethylsilanone, both dimethylsilanone and dichlorosilanone are generated.
Method for producing polyimidesiloxane
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Paragraph 0040, (2018/10/16)
PROBLEM TO BE SOLVED: To provide a method for synthesizing siloxanes at will in good yield while maintaining high structural controllability, which can be applied to substrates having various substituents.SOLUTION: The method comprises reacting benzyloxysilanes and silicon halides in the absence of hydrogen using a catalyst comprising a transition metal or a compound thereof, preferably a metal of group 9 or group 10 of the periodic table or a compound thereof. Thereby, corresponding siloxanes can be produced safely and simply in high yield under a mild reaction condition accompanied by elimination of a benzyl halide. Especially, by using an active carbon-supported catalyst as a heterogeneous catalyst, the target siloxanes can be separated easily.
Rapid assembly of explicit, functional silicones
Grande, John B.,Gonzaga, Ferdinand,Brook, Michael A.
experimental part, p. 9369 - 9378 (2011/01/07)
The impressive surface activity of silicones can be enhanced by the incorporation of hydrophilic organic functional groups and polymers. Traditional routes to such compounds, which typically involve platinum-catalyzed hydrosilylation, suffer from incompatibility with certain functional groups. B(C6F5)3-catalyzed condensation of hydrosilanes with alkoxysilanes offers new opportunities to prepare explicit silicone structures. We demonstrate here that conversion of alcohols to silyl ethers competes unproductively with alkoxysilane conversion to disiloxanes. By contrast, a wide range of structurally complex alkyl halide and oligovinyl compounds can be readily made in high yield. Thermal 3+2-cycloadditions and thiol-ene click reactions are used to convert these compounds into surface active materials. The Royal Society of Chemistry.