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Sigma-Aldrich

Silicone oil

for oil baths (from −50°C to +200°C)

Synonym(s):

Dimethyl polysiloxane

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About This Item

Linear Formula:
[-Si(CH3)2O-]n
CAS Number:
MDL number:
UNSPSC Code:
12352100
NACRES:
NA.21

grade

for oil baths (from −50°C to +200°C)

Quality Level

vapor density

>1 (vs air)

vapor pressure

<5 mmHg ( 25 °C)
5 mmHg ( 20 °C)

form

oil

refractive index

n20/D 1.403 (lit.)
n20/D 1.406

viscosity

100 mPa.s(20 °C)

bp

>140 °C/0.002 mmHg (lit.)

density

0.967 g/mL at 20 °C

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General description

Silicone oil is typically used for oil baths in research labs for reactions that require heating/reflux temperatures in the range of -50°C to +200°C. Oil baths provide more uniform heat in comparison to other heating devices.
Silicone oil is useful for the preparation of oil baths having a temperature in the range of -50°C to +200°C.

Application

Silicone oil has been used for the protection of carbon steel alloy samples in a study. Silicone oil has also been used as a heat reservoir during NMR (Nuclear Magnetic Resonance) analysis.

Storage Class Code

10 - Combustible liquids

WGK

WGK 1

Flash Point(F)

214.0 °F - closed cup

Flash Point(C)

101.1 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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