| Identification | More | [Name]
Methyltriethoxysilane | [CAS]
2031-67-6 | [Synonyms]
METHYLTRIETHOXYSILANE
MTES
TRIETHOXYMETHYLSILANE
A 162
a162
CM9050
Dynasylan MTES
ICI-EP 5850
ici-ep5850
Methaneorthosiliconic Acid, triethyl ester
Methyltriethoxylsilane
methyltriethoxy-silan
Silane, methyltriethoxy-
Silane,triethoxymethyl-
triethoxymethyl-silan
Triethoxysilylmethane
Union carbide a-162
unioncarbidea-162
METHYLTRIETHOXYSILANE, TECH., 90%
Triethoxymethylsilane=MTES | [EINECS(EC#)]
217-983-9 | [Molecular Formula]
C7H18O3Si | [MDL Number]
MFCD00009066 | [Molecular Weight]
178.3 | [MOL File]
2031-67-6.mol |
| Chemical Properties | Back Directory | [Appearance]
Colorless clear liquid | [Melting point ]
<-40°C | [Boiling point ]
141-143 °C(lit.)
| [density ]
0.895 g/mL at 25 °C(lit.)
| [vapor density ]
>1 (vs air)
| [vapor pressure ]
11 mm Hg ( 20 °C)
| [refractive index ]
n20/D 1.383(lit.)
| [Fp ]
75 °F
| [storage temp. ]
Flammables area | [form ]
liquid | [color ]
colorless | [Specific Gravity]
0.896 | [Odor]
Mild odor | [Stability:]
Stability Moisture-sensitive. Flammable-note low flash point. Incompatible with acids, oxidizing agents, moisture, water. | [Water Solubility ]
INSOLUBLE | [Hydrolytic Sensitivity]
7: reacts slowly with moisture/water | [Sensitive ]
Moisture Sensitive | [BRN ]
1742453 | [Dielectric constant]
3.8500000000000001 | [InChIKey]
CPUDPFPXCZDNGI-UHFFFAOYSA-N | [LogP]
-2.4-2.2 | [CAS DataBase Reference]
2031-67-6(CAS DataBase Reference) | [NIST Chemistry Reference]
Silane, triethoxymethyl-(2031-67-6) | [EPA Substance Registry System]
2031-67-6(EPA Substance) |
| Safety Data | Back Directory | [Risk Statements ]
R10:Flammable. | [Safety Statements ]
S16:Keep away from sources of ignition-No smoking . | [RIDADR ]
UN 1993 3/PG 3
| [WGK Germany ]
3
| [RTECS ]
VV4640000
| [F ]
10-21 | [Autoignition Temperature]
220 °C | [TSCA ]
Yes | [HazardClass ]
3 | [PackingGroup ]
III | [HS Code ]
29310095 | [Toxicity]
LD50 orally in Rabbit: 15700 mg/kg |
| Questions And Answer | Back Directory | [Description]
Methyltriethoxysilane is an alkylalkoxysilane. It is a clear, colorless liquid with an odor characteristic of alcohols. It hydrolyzes slowly in the presence of moisture to form reactive silanols. These react further to produce oligosiloxanes and then polysiloxanes.
As a Filler Modifier, Methyltrimethoxysilane is used mainly to render a wide range of surfaces and materials water repellent (e.g. mineral fillers, pigments, glass, cardboard). It may be used pure or in solution to treat fillers, using suitable mixing equipment. It may be necessary to first pre-treat the substrate with water and/or a catalyst. It is also used in the production of silicone resins and condensation-curing silicone rubber, used as an important component in sol-gel systems.
As one of the most common Alkoxy Crosslinkers, Methyltrimethoxysilane has high reactivity that precedes by nucleophilic substitution usually in the presence of acid or base catalysts.
|
| Hazard Information | Back Directory | [Chemical Properties]
Colorless clear liquid | [Uses]
Methyltriethoxysilane is used in production of silicone polymers or silicone resin. It is used in non-metal surface treatment, non-aqueous polymer preparation, manufacture of semi-conductors, coatings and sealants. It finds application as cross linking agent and an adhesion promoter. | [Flammability and Explosibility]
Flammable | [Toxics Screening Level]
The initial threshold screening level (ITSL) for methyltriethoxysilane is 23 μg/m3 based on an annual
averaging time. |
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