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1112-39-6

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Identification

Name
Dimethyldimethoxysilane
CAS
1112-39-6
Synonyms
DIMETHOXYDIMETHYLSILANE
DIMETHYLDIMETHOXYSILANE
ay43-004
CD5605
dimethoxydimethyl-silan
KBM 22
kbm22
tsl8112
tsl8117
DIMETHOXYDIMETHYLSILANE, ASSAY>99.5%, METALS 99.999%
Dimethyldimethoxysilane99%alsoavailable
Silane, dimethoxydimethyl-
Dimethyldimethoxysilane, Dow Corning(R) product Z-6194
EINECS(EC#)
214-189-4
Molecular Formula
C4H12O2Si
MDL Number
MFCD00025691
Molecular Weight
120.22
MOL File
1112-39-6.mol

Chemical Properties

Appearance
Colorless clear liquid
Melting point 
-80°C
mp 
-80°C
Boiling point 
81.4 °C(lit.)

bp 
81.4 °C(lit.)

density 
0.88 g/mL at 25 °C(lit.)

refractive index 
n20/D 1.369(lit.)

Fp 
50 °F

storage temp. 
Store below +30°C.
form 
liquid
Specific Gravity
0.88
Water Solubility 
decomposes
Sensitive 
Moisture Sensitive
Hydrolytic Sensitivity
7: reacts slowly with moisture/water
BRN 
1733694
InChIKey
JJQZDUKDJDQPMQ-UHFFFAOYSA-N
CAS DataBase Reference
1112-39-6(CAS DataBase Reference)
NIST Chemistry Reference
Silane, dimethoxydimethyl-(1112-39-6)
EPA Substance Registry System
1112-39-6(EPA Substance)

Safety Data

Hazard Codes 
F,Xi
Risk Statements 
R11:Highly Flammable.
R36:Irritating to the eyes.
R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Statements 
S16:Keep away from sources of ignition-No smoking .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S33:Take precautionary measures against static discharges .
S36:Wear suitable protective clothing .
S37/39:Wear suitable gloves and eye/face protection .
RIDADR 
UN 1993 3/PG 2

WGK Germany 
3

RTECS 
VV3641666


10-21
TSCA 
Yes
HazardClass 
3
PackingGroup 
II
HS Code 
29319090
Toxicity
LC inhalation in rat: > 21350mg/m3/4

Material Safety Data Sheet(MSDS)

Questions And Answer

Description
Dimethyldimethoxysilane is a monomeric alkylalkoxysilane. It hydrolyzes in contact with water, releasing methanol, to form highly reactive silanols, which further condense to form oligomeric and polymeric siloxanes.

Dimethyldimethoxysilane is mainly used in these aspects:
  • In the synthesis of chemical intermediates.
  • As an additive for the production of silicone resins.
  • In the hydrophobization of surfaces, like glass, pigments etc.

Hazard Information

Chemical Properties
Colorless clear liquid
Uses
It is employed as silylating agent for diols. Used as a monomer (?building block?) in the production of silicone polymers or silicone resins, as an intermediate (starting material) in the production of other organosilicon substances. Also employed in non-metal surface treatment to enhance the adhesion properties of surfaces. Used in sealants, in silicone polymer preparations (for the production of elastomers), in mould-making, in semiconductor manufacture, as a laboratory chemical in research and development activities.

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