CAS 107-51-7 Poly(dimethylsiloxane) - Materials / Alfa Chemistry

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Poly(dimethylsiloxane)

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Catalog Number

ACM107517-1

Product Name

Poly(dimethylsiloxane)

Structure

CAS

107-51-7

Category

Salt

Synonyms

Octamethyltrisiloxane

Description

Poly(dimethylsiloxane) (PDMS), also known as dimethicone, is an organosilicon compound that is widely used as a siloxane based elastomer. It is a hydrophobic material with attractive physical and chemical properties such as elasticity, optical transparency, tunable surface chemistry, and low electrical conductivity.

IUPAC Name

dimethyl-bis(trimethylsilyloxy)silane

Molecular Weight

236.53

Molecular Formula

[(CH3)3SiO]2Si(CH3)2

Canonical SMILES

C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C

InChI

1S/C8H24O2Si3/c1-11(2,3)9-13(7,8)10-12(4,5)6/h1-8H3

InChI Key

CXQXSVUQTKDNFP-UHFFFAOYSA-N

Boiling Point

153 °C (lit.)

Melting Point

-82 °C (lit.)

Density

0.82 g/mL at 25 °C (lit.)

Solubility

1.44e-07 M;Immiscible with water;Immiscible with alcohol;Miscible with chloroform; soluble in chlorinated hydrocarbons, benzene, toluene, xylene, n-hexane, petroleum spirits, ether, amyl acetate; very slightly soluble in isopropyl alcohol; insoluble in methanol, acetone

Color/Form

Colorless oil;Clear colorless liquids

Complexity

149

Covalently-Bonded Unit Count

EC Number

203-497-4;613-156-5;618-433-4

Exact Mass

236.10841g/mol

Formal Charge

Heavy Atom Count

Log P

6.6 (LogP)

MeSH Entry Terms

dimethicone;dimethyl polysiloxane;dimeticone

Monoisotopic Mass

236.10841g/mol

Other Experimental

Silcone oil consisting of dimethylsiloxane polymers range in viscosities from 0.65-1,000,000 centistokes at room temp;Low surface tension, inert /Silicones/;Index of refraction: 1.4013 to 1.4053 at 35 °C; viscosity at 25 °C: 350 cSt; density: 0.965-0.973 /Dimethicone 350/;Viscosity: 41 cSt at 37.8 °C /Silicone fluid with 10 mm sq/S viscosity/;DIMETHYLPOLYSILOXANES ARE PRACTICALLY INERT POLYMERS

Packaging

50 mL in glass bottle

Refractive Index

n20/D 1.384 (lit.)

Rotatable Bond Count

Stability

Stable to heat and ... resistant to most chemical substances, although they are affected by strong acids.

UNII

9G1ZW13R0G

Vapor Density

Pour point -73 °C; Electric Strength 1.4 KV/um; Electric Constant 2.60; Thermal conductivity at 65 °C = 1.3 W/(m.k). /Silicone fluid with 10 mm sq/5 viscosity/

Vapor Pressure

3.34 mmHg

Viscosity

1.0 cSt(25 °C)

MSDS

Download MSDS

COA

Download COA

Spec Sheet

Download Spec Sheet

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