2,2,4,4,6,6-Hexamethylcyclotrisilazane Chemical Properties

Melting point:

−10 °C(lit.)

Boiling point:

188 °C756 mm Hg(lit.)

Density 

0.92 g/mL at 25 °C(lit.)

vapor pressure 

35Pa at 25℃

refractive index 

n20/D 1.445(lit.)

Flash point:

139 °F

Water Solubility 

Decomposes in contact with water,Insoluble in water

pka

14.76±0.20(Predicted)

form 

liquid

color 

colorless

Specific Gravity

0.922

Hydrolytic Sensitivity

7: reacts slowly with moisture/water

BRN 

774739

InChIKey

WGGNJZRNHUJNEM-UHFFFAOYSA-N

CAS DataBase Reference

1009-93-4(CAS DataBase Reference)

NIST Chemistry Reference

Hexamethylcyclotrisilazane(1009-93-4)

EPA Substance Registry System

Cyclotrisilazane, 2,2,4,4,6,6-hexamethyl- (1009-93-4)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

RIDADR 

1993

WGK Germany 

3

RTECS 

GZ4720000

F 

10-21

TSCA 

Yes

HazardClass 

3.2

PackingGroup 

III

HS Code 

29349990

MSDS

• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich

2,2,4,4,6,6-Hexamethylcyclotrisilazane Usage And Synthesis

Description

2,2,4,4,6,6-Hexamethylcyclotrisilazane is a colorless liquid that is soluble in water. It has an odor similar to ether and a boiling point of about 100 degrees Celsius. The chemical formula for this compound is CH3(CH2)6SiCl6. 2,2,4,4,6,6-Hexamethylcyclotrisilazane has been used as a solvent for producing polymers and as a reagent for organic synthesis. It may also be used as a precursor to silicon dioxide nanoparticles used in producing semiconductors and solar cells. 2,2,4,4,6,6-Hexamethylcyclotrisilazane reacts with hydrochloric acid to produce hydrogen chloride gas and zirconium oxide. It also reacts with sodium citrate in the presence of fatty acids to form an ester product called methyl eth.

Chemical Properties

clear colorless liquid

Hazard

Moderately toxic by ingestion.

Flammability and Explosibility

Flammable

Purification Methods

Purify it by fractional distillation at atmospheric pressure until the temperature reaches 200o. It is moisture sensitive. The residue in the flask is mostly octamethylcyclotetrasilazane. [Brewer & Haber J Am Chem Soc 70 3888 1948, Beilstein 4 III 1887.]

Toxics Screening Level

The ITSL for hexamethylcyclotrisilazane is 0.1 μg/m3 based on an annual averaging time.

2,2,4,4,6,6-Hexamethylcyclotrisilazane(1009-93-4)Related Product Information

• Heptamethyldisilazane
• Heptamethyldisilazane
• Octamethylcyclotetrasilazane
• N,N-Dimethyldodecylamine
• N-Methyl-2-pyrrolidone
• 1,2,2,3,4,4-hexaphenyl-1,3,5,2,4,6-triazatrisilinane
• Hexamethyldisilazane
• Sodium bis(trimethylsilyl)amide
• METHYL-2-PYRROLIDONE
• Hexamethylcyclotrisiloxane
• 1,1,3,3-Tetramethyldisilazane
• 1,2,3,4,5,6 HEXAMETHYLCYCLOTRISILAZANE
• 1,2,3,4,5,6 HEXAMETHYLCYCLOTRISILAZANE 95%
• 1,3,5-TRIVINYL-1,3,5-TRIMETHYLCYCLOTRISILAZANE
• 2,2,4,4,6,6-Hexamethylcyclotrisilazane