| Identification | Back Directory | [Name]
Poly(methylhydrosiloxane) | [CAS]
63148-57-2 | [Synonyms]
Hydrosilicone oil
VISCOSITY 85 CST.
Hydrogen silicone oil
Methyl H polysiloxane
Polymethyldrosiloxane
Methylhydro-siliconeoil
Poly(methylhydrosiloxane)
DK-H202 methyl silicone oil
Methyl Hydrogen Silicone Fluid
methylhydrogensiloxane polymer
siloxanesandsilicones,mehydrogen
siloxanesandsilicones,methylhydrogen
Poly(Methylhydrosiloxane), 15-40 cps
POLY(DIMETHYLSILOXANE-CO-METHYLHYDRO-
Methylhydrogensiloxane polymer, PMHS
POLY(METHYLHYDROSILOXANE), TRIMETHYLSILY
POLYMETHYLHYDROSILOXANE: VISCOSITY 85 CST.
POLYMETHYLHYDROSILOXANE, VISCOSITY 35-45 CST.
POLYMETHYLHYDROSILOXANE, VISCOSITY 15-25 CST.
Polymethylhydrosiloxane, viscosity 25-35 cSt.
Poly(methylhydrosiloxane-co-dimethylsiloxane)
PolyMethylhydrosiloxane, viscosity 30-45 cSt.
PolyMethylhydrosiloxane, viscosity 15-29 cSt.
Poly(Methylhydrosiloxane) average Mn 1,700-3,200
Methylhydrogensiloxane Dimethylsiloxane Copolymer
PolyMethylHydrosiloxanes,Trimethylsiloxyterminated
DOW CORNING 1107 WATER REPELLENT AND POWDER TREATMENT
Poly(Methylhydrosiloxane) viscosity 15-40 MPa.s (20 C)
POLYMETHYLHYDROSILOXANE, TRIMETHYLSILYL TERMINATED, 15-25cs
POLYMETHYLHYDROSILOXANE, TRIMETHYLSILYL TERMINATED, 25-35cs
POLYMETHYLHYDROSILOXANE, TRIMETHYLSILYL TERMINATED, 35-45cs
polymethylhydrosiloxane, trimethylsilyl terminated, 15-25 cst
polymethylhydrosiloxane, trimethylsilyl terminated, 20-35 cst
POLYMETHYLHYDROSILOXANE, TRIMETHYLSILYL TERMINATED, 15-29 cSt
POLYMETHYLHYDROSILOXANE, TRIMETHYLSILYL TERMINATED, 24-30 cSt
POLYMETHYLHYDROSILOXANE, TRIMETHYLSILYL TERMINATED, 30-45 cSt
Poly(methylhydrosiloxane),Methylhydrogensiloxane polymer, PMHS
Poly(Methylhydrosiloxane), triMethylsilyl terMinated average Mn ~390
Poly(methylhydrosiloxane-co-dimethylsiloxane), trimethylsilyl terminated | [EINECS(EC#)]
217-496-1 | [Molecular Formula]
C7H22O2Si3 | [MDL Number]
MFCD00048000 | [MOL File]
63148-57-2.mol | [Molecular Weight]
222.5 |
| Chemical Properties | Back Directory | [Melting point ]
<-60°C | [Boiling point ]
142 °C(lit.)
| [density ]
1.006 g/mL at 25 °C(lit.) | [vapor pressure ]
38 hPa (20 °C) | [refractive index ]
n20/D 1.382(lit.)
| [Fp ]
82 °F
| [storage temp. ]
Store below +30°C. | [solubility ]
Soluble in most ethereal, chlorinated, or hydrocarbon solvents as well as EtOH, i-PrOH, warm DMF, and warm NMP; insoluble in MeOH, DMSO, acetonitrile, and water | [Specific Gravity]
0.98 | [PH]
7 (H2O) | [Water Solubility ]
Not miscible or difficult to mix in water. | [CAS DataBase Reference]
63148-57-2 | [EPA Substance Registry System]
Siloxanes and Silicones, Me hydrogen(63148-57-2) |
| Hazard Information | Back Directory | [Chemical Properties]
Colorless liquid | [Uses]
Polymethylhydrosiloxane(PMHS) is an easily handled,inexpensive,non-toxic,and mild reducing agent. PMHS is attractive as a substitute for more expensive or hazardous silanes or siloxanes and as the stoichiometric reductant in catalytic organotin-mediated processes.
It can be cross linked by metal catalyst at low temperature to form waterproof membrane. It is used as waterproof agent of textile, glass, pottery, paper, leather, metal, cement and marble etc, especially in textile waterproof. It is used as insulator and cross linker of paper.
Poly(methylhydrosiloxane) is used in the reduction of esters to alcohols, catalyzed by a combination of titanocene dichloride and either n-BuLi or EtMgBr. It is a safer alternative to triethoxysilane, B22063, for reduction of phosphine oxides to phosphines, catalyzed by Ti(O-i-Pr)4. It is also used in greener amine synthesis by reductive amination as an alternative to borohydrides. | [Description]
Poly(methylhydrosiloxane) is a reducing agent. For example, it can
be used for the reduction of esters to alcohols as well as the
reduction of aldehydes and ketone. It can also be used for the
reduction of phosphine oxides to phosphine. Recent study has also
used it for conjugate reduction of α, β-Unsaturated Carbonyl and
Carboxyl Compounds. Finally, it is also used in greener amine
synthesis mediated by reductive amination which is an alternative to
borohydrides. | [Preparation]
Poly(methylhydrosiloxane) is prepared by hydrolysis of methyldichlorosilane followed by heating (60–150 ?C) the resultant mixture of cyclic
silanes in the presence of hexamethyldisiloxane generates the
linear polysiloxane. | [General Description]
| [Synthesis]
Poly(methylhydrosiloxane)(PMHS) is synthesized by the controlled hydrolysis of MeSiHCl2[1].
 | [Advantages]
PMHS is synthesized by the controlled hydrolysis of MeSiHCl2, a byproduct in producing Me2SiCl2, a feedstock for the silicone industry. As a byproduct of the silicone industry, it is a cheap, easy to handle, and environmentally friendly reducing agent. PMHS is more air and moisture-stable than other silanes and can be stored for long periods of time without loss of activity. In addition to being synthesized from a waste product, PMHS is cheap, stable to air and moisture, and is considered nontoxic[2]. |
| Questions And Answer | Back Directory | [Handing storage]
Stable to air and moisture; incompatible with strong acids, bases, or oxidants (forms hydrogen upon decomposition); generally considered non-toxic, however thorough toxicity studies have not been performed; skin/eye contact and inhalation should be avoided. |
| Questions and Answers (Q&A) | Back Directory | [References]
https://www.alfa.com/en/catalog/L14561/
http://www.sigmaaldrich.com/catalog/product/aldrich/176206? lang=en®ion=US
Wang, Zhigang, A. E. W. ‡. And, and J. G. Verkade. "P (MeNCH2CH2)3N: An Efficient Promoter for the Reduction of Aldehydes and Ketones with Poly (methylhydrosiloxane)." Cheminform 31.7(2000):no-no.
Dfj, Hamstra, et al. "Poly (methylhydrosiloxane) as a green reducing agent in organophosphorus-catalysed amide bond formation." Organic & Biomolecular Chemistry 15.30 (2017).
Kawamorita, Soichiro, et al. "Conjugate Reduction of α, β- Unsaturated Carbonyl and Carboxyl Compounds with Poly (methylhydrosiloxane) Catalyzed by a Silica-Supported Compact Phosphane–Copper Complex."Advanced Synthesis & Catalysis 354.18 (2012):3440-3444.
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