Merck
All Photos(1)

433012

Sigma-Aldrich

Poly(dimethylsiloxane), vinyl terminated

average Mw ~25,000, viscosity 850-1,150 cSt (25 °C)(lit.)

Synonym(s):
PDMS
CAS Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.23

form

liquid

Quality Level

mol wt

average Mw ~25,000
average Mw ~25,000

refractive index

n20/D 1.4052

viscosity

850-1,150 cSt(25 °C)(lit.)

bp

>93 °C (lit.)

iodine value

2.2‑3.5

density

0.965 g/mL at 25 °C (lit.)

SMILES string

C[Si](C)=O

InChI

1S/C8H18OSi2/c1-7-10(3,4)9-11(5,6)8-2/h7-8H,1-2H2,3-6H3

InChI key

BITPLIXHRASDQB-UHFFFAOYSA-N

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This Item
481653482161481955
form

liquid

form

-

form

-

form

-

refractive index

n20/D 1.4052

refractive index

n20/D 1.406 (lit.)

refractive index

n20/D 1.405

refractive index

n20/D 1.406

viscosity

850-1,150 cSt(25 °C)(lit.)

viscosity

~3 cSt(lit.)

viscosity

3,500 cSt

viscosity

~65 cSt

density

0.965 g/mL at 25 °C (lit.)

density

1 g/mL at 25 °C (lit.)

density

0.98 g/mL at 25 °C

density

0.97 g/mL at 25 °C

mol wt

average Mw ~25,000

mol wt

average Mn ~3,000

mol wt

-

mol wt

-

bp

>93 °C (lit.)

bp

>177 °C (lit.)

bp

-

bp

>200 °C

Application

Mold-making elastomers and encapsulants and sealants for electronic components.

Features and Benefits

Polymerized product provides non-corrosive shield against moisture, dirt and contaminants for electrical components. Polymer may be heat or room temperature cured. Polymerization produces no volatile gases.

Physical form

Divinyl functional reactive silicone fluid.

Storage Class Code

12 - Non Combustible Liquids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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