Ethyltriethoxysilane Ethyltriethoxysilane

Structural formula

• Numbering system
• Physical property data
• Toxicological data
• Ecological data
• Molecular structure data
• Computing chemical data
• More
  • Properties and Stability
  • Storage method
  • Synthesis method
  • Purpose

Numbering system

CAS number:78-07-9

MDL number:MFCD00026754

EINECS number:201-080-1

RTECS number:VV4205000

BRN number:1362028

PubChem number:24845646

Physical property data

1. Properties: colorless liquid with special odor and slow decomposition in humid air.

2. Density (g/mL, 25/4℃): 0.86

3. Relative vapor density (g/mL, air=1): Uncertain

4. Melting point (ºC): 108-113℃

5. Boiling point (ºC, normal pressure): 159℃

6. Boiling point (ºC, 5.2kPa): Uncertain

7. Refractive index: 1.3853

8. Flash point (ºC): Uncertain

9. Specific rotation (º): Uncertain

10. Autoignition point or ignition temperature (ºC): Uncertain

11. Vapor pressure (kPa, 25ºC): Uncertain

12. Saturation Vapor pressure (kPa, 60ºC): Uncertain

13. Heat of combustion (KJ/mol): Uncertain

14. Critical temperature (ºC): Uncertain

15. Critical pressure (KPa): Uncertain

16. Log value of oil-water (octanol/water) partition coefficient: Uncertain

17. Explosion upper limit (% ,V/V): Uncertain

18. Lower explosion limit (%,V/V): Uncertain

19. Solubility: Insoluble in water, miscible in alcohol , ether, etc.

Toxicological data

1. Acute toxicity

Rat caliber LD50: 14mg/kg

Rabbit skin LD50: 16mL/kg

2. Neurotoxicity

Rabbit skin test: 500mg/24H; Rabbit eye test: 500mg/24H;

Ecological data

None yet

Molecular structure data

1. Molar refractive index: 53.60

2. Molar volume (cm³/mol): 215.4

3. Isotonic specific volume (90.2K ): 468.5

4. Surface tension (dyne/cm): 22.3

5. Polarizability (10^-24cm³): 21.03

Compute chemical data

1. Number of hydrogen bond donors: 0

2. Number of hydrogen bond acceptors: 3

3. Number of rotatable chemical bonds: 7

4. Topological molecular polar surface area (TPSA): 27.7

5. Number of heavy atoms: 12

6. Surface charge: 0

7. Complexity : 91.5

8. The number of isotope atoms: 0

9. The number of determined atomic stereocenters: 0

10. The number of uncertain atomic stereocenters: 0

11. Determined number of stereocenters of chemical bonds: 0

12. Uncertain number of stereocenters of chemical bonds: 0

13. Number of covalent bond units :1

Properties and stability

Colorless and transparent liquid with a special smell. It decomposes slowly in moist air and is toxic if inhaled. Boiling point 159℃. Relative density 0.9207. Refractive index 1.3853. It is easily hydrolyzed and releases ethanol to form the condensation product of ethylsilanetriol. Reacting with organic metal compounds, the ethoxy group in the Si-OC2H5 bond in the molecule can be replaced by the corresponding organic group.

Storage method

This product should be sealed and stored in a cool place.

Synthesis method

It can be prepared by the reaction of ethyltrichlorosilane and absolute ethanol, or by the reaction of tetraethoxysilane and ethylmagnesium bromide.

Purpose

It is used to synthesize silicone intermediates and high molecular polymers, and can also be used as a cross-linking agent for room temperature vulcanized silicone rubber.