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Name	Methyldimethoxysilane	EINECS	240-914-9
CAS No.	16881-77-9	Density	0.861
PSA	18.46000	LogP	0.12950
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		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;	Article Data	11

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)	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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