63148-57-2

Basic information

• Product Name: Poly(methylhydrosiloxane)
• Synonyms: DOW CORNING 1107 WATER REPELLENT AND POWDER TREATMENT;Poly(methylhydrosiloxane);Hydrosilicone oil;POLYMETHYLHYDROSILOXANE, TRIMETHYLSILYL TERMINATED, 15-25cs;POLYMETHYLHYDROSILOXANE, TRIMETHYLSILYL TERMINATED, 25-35cs;POLYMETHYLHYDROSILOXANE, TRIMETHYLSILYL TERMINATED, 35-45cs;Methylhydrogensiloxane polymer, PMHS;Poly(methylhydrosiloxane-co-dimethylsiloxane)
• CAS NO: 63148-57-2
• Molecular Formula: C7H22O2Si3
• Molecular Weight: 222.5
• EINECS: 217-496-1
• Product Categories: Silane series;PDMS Elastomers/ResinsPolymer Science;Polysiloxanes;Self Assembly&Contact Printing;Silicones;Stamps for Nanoprint Lithography&Microcontact Printing;Silicone Series
• Mol File: 63148-57-2.mol
• Article Data: 0

Chemical Properties

• Melting Point: <-60°C
• Boiling Point: 142 °C(lit.)
• Flash Point: 82 °F
• Appearance: colorless transparent
• Density: 1.006 g/mL at 25 °C(lit.)
• Vapor Pressure: 38 hPa (20 °C)
• Refractive Index: n20/D 1.382(lit.)
• Storage Temp.: Store below +30°C.
• Water Solubility: Not miscible or difficult to mix in water.
• CAS DataBase Reference: Poly(methylhydrosiloxane)(CAS DataBase Reference)
• NIST Chemistry Reference: Poly(methylhydrosiloxane)(63148-57-2)
• EPA Substance Registry System: Poly(methylhydrosiloxane)(63148-57-2)

Safety Data

• Hazard Codes: Xi
• Statements: 10-36/37/38
• Safety Statements: 26-36-24/25-23-16
• RIDADR: UN 1993 3/PG 2
• WGK Germany: 3
• F: 10-21
• TSCA: Yes
• Hazardous Substances Data: 63148-57-2(Hazardous Substances Data)

Usage

Description

Poly(methylhydrosiloxane), also known as PMHS, is a versatile reducing agent with a wide range of applications in various industries. It is an easily handled, inexpensive, non-toxic, and mild reducing agent that can be used for the reduction of esters to alcohols, aldehydes, ketones, and phosphine oxides to phosphines. It is also used in greener amine synthesis mediated by reductive amination, which is an alternative to borohydrides.

Uses

Used in Chemical Synthesis:
Poly(methylhydrosiloxane) is used as a reducing agent for 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 the 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.
Used in Textile Industry:
Poly(methylhydrosiloxane) is used as a waterproof agent for textiles, providing water resistance to various fabrics.
Used in Construction Industry:
Poly(methylhydrosiloxane) is used as a waterproof agent for various construction materials such as glass, pottery, paper, leather, metal, cement, and marble.
Used in Paper Industry:
Poly(methylhydrosiloxane) is used as an insulator and cross-linker for paper, improving its properties and performance.
Used in Electronics Industry:
Poly(methylhydrosiloxane) can be cross-linked by metal catalysts at low temperatures to form waterproof membranes, which can be used in electronic devices for protection against moisture and other environmental factors.

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.