1,1,3,3-Tetramethyl-1,3-divinyldisilazane Chemical Properties

Melting point:

<0°C

Boiling point:

161-163 °C

Density 

0.819

vapor pressure 

1.2-8611hPa at 20-25℃

refractive index 

n20/D 1.4405(lit.)

Flash point:

34°C

storage temp. 

2-8°C

solubility 

soluble in Methanol

form 

clear liquid

pka

10.77±0.70(Predicted)

color 

Colorless to Light yellow to Light orange

Specific Gravity

0.819

Water Solubility 

Hydrolyzes in water.

Hydrolytic Sensitivity

7: reacts slowly with moisture/water

Sensitive 

Moisture Sensitive

BRN 

2411661

InChIKey

WYUIWUCVZCRTRH-UHFFFAOYSA-N

LogP

0.23-1.5 at 20℃

CAS DataBase Reference

7691-02-3(CAS DataBase Reference)

NIST Chemistry Reference

Silanamine, 1-ethenyl-N-(ethenyldimethylsilyl)-1,1-dimethyl-(7691-02-3)

EPA Substance Registry System

Silanamine, 1-ethenyl-N-(ethenyldimethylsilyl)-1,1-dimethyl- (7691-02-3)

Safety Information

Hazard Codes 

C

Risk Statements 

10-34-22

Safety Statements 

26-36/37/39-45-23

RIDADR 

UN 2920 8/PG 2

WGK Germany 

3

RTECS 

VV1302250

F 

10-21

TSCA 

TSCA listed

HazardClass 

8

PackingGroup 

II

HS Code 

29319090

MSDS

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

1,1,3,3-Tetramethyl-1,3-divinyldisilazane Usage And Synthesis

Chemical Properties

Clear liquid with ammonia odor

Uses

1,1,3,3-Tetramethyl-1,3-divinyldisilazane is used for silicone rubber, silicone resin, silicone gel and vinyl manufacturing.

Application

1,1,3,3-Tetramethyl-1,3-divinyldisilazane, a vinylsilazane, could cross-linked with polyhydromethylsiloxane in the presence of Karstedt's catalyst. When the reactions were carried out in solvent-free conditions, non-porous polysiloxane-silazane networks were obtained[1].

Flammability and Explosibility

Flammable

Synthesis

Add 2 mol of dimethyl vinyl chlorsilane to the reactor, pass ammonia into it for the reaction, the amount of ammonia is controlled to be the molar ratio of dimethyl vinyl chlorsilane to ammonia 2:3.4, and 99% of the ammonia is passed in 2 hours,

A, control the reaction pressure to be 5 kg of NH3 pressure, the reaction is carried out at 130??C, and the reaction time is 6h, and at the end of the reaction, add dichloroethane to dissolve the Product;

B, the above product will be added to the total amount of product mass of 0.05% of hydroquinone, tert-butyl catechol and copper naphthenate, at a temperature of 160-163 ??, 760 mmHg conditions for molecular distillation, to obtain colorless transparent liquid. The content of the product was 98.95% and the yield was 98%. The density of the tested product was 0.819g/cm3, ammonium chloride was 0, 1,1,3,3-tetramethyl-1,3-divinyl disilazane content was 0.1%.

Toxics Screening Level

The initial threshold screening level (ITSL) for tetramethyldivinyldisilzane (CASRN 7691-02-3) is 30 μg/m3 based on an annual averaging time.

References

[1] Justyna Olejarka . “Non-porous and porous materials prepared by cross-linking of polyhydromethylsiloxane with silazane compounds.” European Polymer Journal 99 (2018): Pages 150-164.

1,1,3,3-Tetramethyl-1,3-divinyldisilazane(7691-02-3)Related Product Information

• Cyclosilazanes, di-Me,Me hydrogen, polymers with di-Me, Me hydrogen silazanes, reaction products with3-(triethoxysilyl)-1-propanamine
• 1,1,1,7,7,7-hexamethyl-3,5-bis[(trimethylsilyl)oxy]-3,5-divinyltetrasiloxane
• 1,3-DIVINYL-1,3-DIMETHYL-1,3-DICHLORODISILOXANE
• 1,3-DIVINYL-1,3-DIPHENYL-1,3-DIMETHYLDISILOXANE
• DIVINYLTETRAPHENYLDISILOXANE
• 1,3-DIVINYLTETRAETHOXYDISILOXANE
• Tetramethyl-1,3-diaminopropane
• N,N,N',N'-Tetramethylethylenediamine
• N,N,N',N'-TETRAMETHYL-1,4-BUTANEDIAMINE
• N-(Trimethylsilyl)imidazole
• 1,3-DIVINYL-1,3-DIPHENYL-1,3-DIMETHYLDISILAZANE
• Silazane
• Tetramethyldipropylene triamine
• Hexamethyldisilazane
• 1,1,3,3-Tetramethyl-1,3-divinyldisilazane
• 1,1,3,3-Tetramethyldisilazane
• Dimethylvinylsilane