Methylphenyldichlorosilane structural formula

Methylphenyldichlorosilane structural formula

Structural formula

Business number 03XX
Molecular formula C7H8Cl2Si
Molecular weight 191.13






Numbering system

CAS number:149-74-6

MDL number:MFCD00000490

EINECS number:205-746-2

RTECS number:VV3530000

BRN number:970975

PubChem number:24867568

Physical property data

1. Properties: colorless and transparent liquid[1]

2. Melting point (℃): -43.4[2]

3. Boiling point (℃): 206~207[3]

4. Relative density (water=1): 1.176[4]

5. Critical pressure (MPa): 2.8[5]

6. Octanol/water partition coefficient: 3.84[6 ]

7. Flash point (℃): 82[7]

8. Ignition temperature (℃): >400[8]

9. Explosion upper limit (%): 8.6[9]

10. Explosion lower limit (%): 0.2[10]

11. Solubility: soluble in methanol, ether, and benzene. [11]

Toxicological data

1. Acute toxicity No data available

2. Irritation No data available

3. Others[12] LDLo: 100mg/kg (rat abdominal cavity)

Ecological data

1. Ecotoxicity No data available

2. Biodegradability No data available

3 .Non-biodegradability No information available

Molecular structure data

1. Molar refractive index: 49.80

2. Molar volume (cm3/mol): 165.2

3. Isotonic specific volume (90.2K ): 381.5

4. Surface tension (dyne/cm): 28.4

5. Polarizability (10-24cm3): 19.74

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP): None

2. Number of hydrogen bond donors: 0

3. Number of hydrogen bond acceptors: 0

4. Number of rotatable chemical bonds: 1

5. Number of tautomers: none

6. Topological molecule polar surface area 0

7. Number of heavy atoms: 10

8. Surface charge: 0

9. Complexity: 108

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 0

12. Uncertain number of atomic stereocenters: 0

13. Determine the number of chemical bond stereocenters: 0

14. Number of uncertain chemical bond stereocenters: 0

15. Number of covalent bond units: 1

Properties and stability

1. Stability[13] Stable

2. Incompatible substances [14] Strong oxidizing agent,�Acid, strong alkali, alcohol, water vapor

3. Conditions to avoid contact[15] Humid air

4. Hazards of aggregation[16] No aggregation

5. Decomposition Product[17] Hydrogen chloride

Storage method

Storage Precautions[18] Store in a cool, dry and well-ventilated warehouse. Keep away from fire and heat sources. The explosion must be sealed and protected from moisture. They should be stored separately from oxidants, acids, alkalis, alcohols, etc. and avoid mixed storage. Use explosion-proof lighting and ventilation facilities. It is prohibited to use mechanical equipment and tools that are prone to sparks. The storage area should be equipped with emergency release equipment and suitable containment materials.

Synthesis method

It can be prepared by reacting methyltrichlorosilane and phenylmagnesium bromide.


1. Used in the polymerization of phenyl-containing silicone oil and silicone rubber to improve the heat resistance or low temperature resistance of silicone oil and silicone rubber. It is one of the important monomers of silicone.

2. Used in the synthesis of silicone resins and phenyl-containing silicon compounds, it is one of the important monomers of silicone.

3. Prepare raw materials for high-temperature silicone oil and other organic silicon compounds. [19]

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CAS NO:3033-62-3

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