Product Name

  • Name

    Methyldimethoxysilane

  • EINECS 240-914-9
  • CAS No. 16881-77-9
  • Article Data11
  • CAS DataBase
  • Density 0.861
  • Solubility 17-1000g/L at 20℃
  • Melting Point -136 °C
  • Formula C3H10O2Si
  • Boiling Point 33.792 °C at 760 mmHg
  • Molecular Weight 106.197
  • Flash Point -25.761 °C
  • Transport Information UN 1992
  • Appearance Colorless clear liquid
  • Safety 16-23-26-36/37/39
  • Risk Codes 11-23/24/25
  • Molecular Structure Molecular Structure of 16881-77-9 (Methyldimethoxysilane)
  • Hazard Symbols R11:Highly flammable.; R37/38:Irritating to respiratory system and skin.; R41:Risks of serious damage to eyes.;
  • Synonyms KBM 12;Dimethoxymethylsilane;Dimethoxymethylhydrosilane;
  • PSA 18.46000
  • LogP 0.12950

Methyldimethoxysilane Chemical Properties

IUPAC: Dimethoxy(methyl)silicon
 Methyldimethoxysilane (16881-77-9) is also called for Dimethoxymethylsilane ; Methylhydrogendimethoxysilane ; Silane, dimethoxymethyl- ; EINECS 240-914-9 ; CID6329250 ; LS-145191 and so on.
Molecular Formula: C3H10O2Si
Molecular Weight: 106.2
EINECS: 240-914-9
Boiling Point: 33.8°C at 760 mmHg
LogP: ACD/LogP: 2.65
ACD/LogD (pH 5.5): 2.65 
ACD/LogD (pH 7.4): 2.65 
ACD/BCF (pH 5.5): 61.23 
ACD/BCF (pH 7.4): 61.23 
ACD/KOC (pH 5.5): 661.78 
ACD/KOC (pH 7.4): 661.78 
H bond acceptors: 2 
H bond donors: 0 
Freely Rotating Bonds: 2
Heavy Atom Count: 6
Formal Charge: 0
Complexity: 28
Isotope Atom Count: 0
Defined Atom StereoCenter Count: 0
Undefined Atom StereoCenter Count: 0
Defined Bond StereoCenter Count: 0
Undefined Bond StereoCenter Count: 0
Covalently-Bonded Unit Count: 1
Enthalpy of Vaporization: 26.74 kJ/mol  
Vapour Pressure: 554 mmHg at 25°C 
The appearance of  Methyldimethoxysilane (16881-77-9) is colorless clear liquid.
The molecular structure of  Methyldimethoxysilane (16881-77-9) :

 

Methyldimethoxysilane Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rabbit LD50 oral 1780uL/kg (1.78mL/kg)   Toxicologist. Vol. 11, Pg. 144, 1991.
rabbit LD50 skin 730uL/kg (0.73mL/kg)   Toxicologist. Vol. 11, Pg. 144, 1991.
rabbit LDLo intravenous 125uL/kg (0.125mL/kg)   Toxicologist. Vol. 11, Pg. 144, 1991.
rat LD subcutaneous > 1500uL/kg (1.5mL/kg)   Toxicologist. Vol. 11, Pg. 144, 1991.
rat LD50 oral 5600uL/kg (5.6mL/kg)   Toxicologist. Vol. 11, Pg. 144, 1991.
rat LD50 skin > 16mL/kg (16mL/kg)   Toxicologist. Vol. 11, Pg. 144, 1991.
rat LDLo intravenous 250uL/kg (0.25mL/kg)   Toxicologist. Vol. 11, Pg. 144, 1991.

Methyldimethoxysilane Safety Profile

A poison by ingestion, subcutaneous, and intravenous routes. A moderate eye irritant. When heated to decomposition it emits acrid smoke and irritating vapors.

Risk Statements:  11-23/24/25
R11: Highly Flammable
R23/24/25: Toxic by inhalation, in contact with skin and if swallowed
Safety Statements:  16-23-26-36/37/39
S16: Keep away from sources of ignition - No smoking
S23: Do not breathe gas/fumes/vapor/spray (appropriate wording to be specified by the manufacturer)
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection
RIDADR:  1992
TSCA:  Yes
HazardClass:  3
PackingGroup:  III

 

Methyldimethoxysilane Specification

Treatment of Methyldimethoxysilane (16881-77-9) in Wastewater, see as follows :
Total removal:                 94.03  percent
Total biodegradation:        0.02  percent
Total sludge adsorption:    0.39  percent
Total to air:                     93.62  percent
(using 10000 hr Bio P,A,S)

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