Methyltriethoxysilane

CAS No.：2031-67-6

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Methyltriethoxysilane Basic information

Description

Product Name:	Methyltriethoxysilane
Synonyms:	METHYLTRIETHOXYSILANE, TECH., 90%;Triethoxymethylsilane=MTES;Methyltriethoxysilane, 98+%;Methyltriathoxysilan;methyltriethoxysilicane;Methyltriethoxylane;Triethoxymethylsilane, 95+%;ND-27
CAS:	2031-67-6
MF:	C7H18O3Si
MW:	178.3
EINECS:	217-983-9
Product Categories:	Functional Materials;Si (Classes of Silicon Compounds);Silane Coupling Agents;Silane Coupling Agents (Intermediates);Si-O Compounds;Trialkoxysilanes;Silicone series;Alkoxy Silanes;Crosslinkers;Crosslinking Agents;Silane series;organosilicon compounds;silane
Mol File:	2031-67-6.mol

Methyltriethoxysilane Chemical Properties

Melting point
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/D1.383(lit.)
Fp	75 °F
storage temp.	Store at <= 20°C.
form	liquid
Specific Gravity	0.896
color	colorless
Water Solubility	INSOLUBLE
Hydrolytic Sensitivity	7: reacts slowly with moisture/water
Sensitive	Moisture Sensitive
BRN	1742453
Stability:	Stability Moisture-sensitive. Flammable - note low flash point. Incompatible with acids, oxidizing agents, moisture, water.
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	Triethoxymethylsilane (2031-67-6)

Safety Information

Risk Statements	10
Safety Statements	16
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

MSDS Information

Provider	Language
Methyltriethoxysilane	English
SigmaAldrich	English
ACROS	English
ALFA	English

Methyltriethoxysilane Usage And Synthesis

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.
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

Methyltriethoxysilane Preparation Products And Raw materials

Raw materials	Ethanol-->Sodium ethoxide-->Methyltrichlorosilane-->4,7-diethoxy-4,7-dimethyl-3,8-dioxa-4,7-disiladecane-->Diethoxymethylsilane-->Diethoxy(methyl)vinylsilane
Preparation Products	METHYLSILANE-->DIPHENYLMETHYLETHOXYSILANE-->Methylphenyldiethoxysilane

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