Pentamethyldisiloxane Chemical Properties

Boiling point:

86 °C (lit.)

Density 

0.760 g/mL at 20 °C (lit.)

refractive index 

n20/D 1.373

Flash point:

-9°C

form 

clear liquid

color 

Colorless to Almost colorless

Specific Gravity

0.758

Water Solubility 

Not miscible or difficult to mix in water.

Sensitive 

Moisture Sensitive

Hydrolytic Sensitivity

3: reacts with aqueous base

BRN 

1734568

InChI

InChI=1S/C5H16OSi2/c1-7(2)6-8(3,4)5/h7H,1-5H3

InChIKey

AOJHDNSYXUZCCE-UHFFFAOYSA-N

SMILES

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

EPA Substance Registry System

Disiloxane, pentamethyl- (1438-82-0)

Safety Information

Hazard Codes 

F

Risk Statements 

11

Safety Statements 

16-23-24/25

RIDADR 

UN 1993 3/PG 2

WGK Germany 

3

F 

10-21

TSCA 

Yes

HazardClass 

3

PackingGroup 

II

HS Code 

29319090

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Pentamethyldisiloxane Usage And Synthesis

Uses

Pentamethyldisiloxane, is an organosilicon compound used in synthesis of siloxane-polyether copolymer surfactants. Pentamethyldisiloxane can also be used as source of the trimethylsilyl functional group in organic synthesis.

Uses

Pentamethyldisiloxane is used in the synthesis of siloxane-polyether copolymer surfactants. It is also used as source of trimethylsilyl functional group in organic synthesis.

Synthesis

Take prepared potassium trimethylsilanolate 1.12kg in 2L of anhydrous tetrahydrofuran, was added dropwise with stirring dimethylchlorosilane1kg, dropwise, room temperature reaction 1h, filtered, concentrated, extracted with ether, dried and concentrated to give a high purity of 98% or more of pentamethyl disiloxane 1.2kg.

Pentamethyldisiloxane(1438-82-0)Related Product Information

• Sodium thiosulfate pentahydrate
• 1,3-BIS(3-AMINOPROPYL)TETRAMETHYLDISILOXANE
• 1,3-Bis(chloromethyl)-1,1,3,3-tetramethyldisiloxane
• 1,3-BIS(DICHLOROMETHYL)-1,1,3,3-TETRAMETHYLDISILOXANE
• Hexamethyldisiloxane
• HEXAPHENYLDISILOXANE
• 1,3-DIPHENYL-1,1,3,3-TETRAMETHYLDISILOXANE
• 1,3-BIS(4-HYDROXYBUTYL)TETRAMETHYLDISILOXANE
• HEXAETHYLDISILOXANE
• 3,3-DIPHENYLHEXAMETHYLTRISILOXANE
• 1,3-bis(3-glycidoxypropyl)tetramethyldisiloxane
• Divinyltetramethyldisiloxane
• DODECAMETHYLPENTASILOXANE
• Octamethyltrisiloxane
• DECAMETHYLTETRASILOXANE
• 1,3-BIS(ACETOXYMETHYL)-1,1,3,3-TETRAMETHYLDISILOXANE
• BIS(BROMOMETHYL)TETRAMETHYLDISILOXANE
• 1,3-BIS(3-CYANOPROPYL)TETRAMETHYLDISILOXANE