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175595

Sigma-Aldrich

Diethoxydimethylsilane

97%

Synonym(s):

Dimethyldiethoxysilane

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About This Item

Linear Formula:
(CH3)2Si(OC2H5)2
CAS Number:
78-62-6
Molecular Weight:
148.28
Beilstein:
1736110
EC Number:
201-127-6
MDL number:
MFCD00009068
UNSPSC Code:
12352103
PubChem Substance ID:
24850513
NACRES:
NA.23

Quality Level

100

Assay

97%

form

liquid

refractive index

n20/D 1.381 (lit.)

bp

114 °C (lit.)

density

0.865 g/mL at 25 °C (lit.)

SMILES string

CCO[Si](C)(C)OCC

InChI

1S/C6H16O2Si/c1-5-7-9(3,4)8-6-2/h5-6H2,1-4H3

InChI key

YYLGKUPAFFKGRQ-UHFFFAOYSA-N

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General description

Diethoxydimethylsilane (DEDMS) is an organically modified silicate (ORMOSIL) with two methyl groups in each unit that facilitate the hydrophobic characteristics. It is mainly utilized to functionalize a variety of substrates.

Application

Diethoxydimethylsilane (DMDES) may be used to modify epoxy resin6 and the surfaces of pure silica and Pd/SiO2 hydrogen gas sensors. Surface modification results in enhanced gas sensing properties of the sensors. {43}-{44}Diethoxydimethylsilane may be used as a precursor for the synthesis of ultrafine SiC powder. {45} Studies report its use as a precursor for ORMOSIL (Organically modified SILicates) and thin a-SiOxCyHz films.{47}
The composite of DEDMS and triethoxymethylsilane can be used to synthesize a liquid precursor resin for the preparation of silicon oxycarbide (SiOC). It can form a sol-gel coating on polyamide-polyethylene (PA/PE), which can be used as an anti-oxidizing food packaging material. It can also be used as a precursor in the synthesis of polydimethylsiloxane, which forms an anti-corrosive coating composite with waterborne polyurethane.

Pictograms

FlameExclamation mark
GHS02,GHS07

Signal Word

Danger

Hazard Statements

H225,H315,H319,H332

Hazard Classifications

Acute Tox. 4 Inhalation - Eye Irrit. 2 - Flam. Liq. 2 - Skin Irrit. 2

Storage Class Code

3 - Flammable liquids

WGK

WGK 2

Flash Point(F)

42.8 °F - closed cup

Flash Point(C)

6 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Improvement of gas-sensing properties of SnO2 by surface chemical modification with diethoxydimethylsilane
Wada K, et al.
Sensors and Actuators B, Chemical, 53(3), 147-154 (1998)
Carbon dioxide laser synthesis of ultrafine silicon carbide powders from diethoxydimethylsilane.
Li, Ya-Li, et al.
Journal of the American Ceramic Society. American Ceramic Society, 77(6), 1662-1664 (1994)
Foaming of polysiloxane resins with ethanol: A new route to pyrolytic macrocellular SiOC foams.
Strachota A, et al.
Ceramics International, 41(10), 13561-13571 (2015)
Surface Modification of Sol-Gel Hybrid films using fluorinated silica nanoparticles
Purcar, V., Donescu, D., Spataru, I. C., Ghiurea, M., Caprarescu, S., Petcu, C., & Nistor
Rev. Roum. Chim., 58(1), 37-42 (2013)
Hydrogen sensing properties of SnO 2 varistors loaded with SiO 2 by surface chemical modification with diethoxydimethylsilane.
Hyodo T, et al.
Sensors and Actuators B, Chemical, 64(1), 175-181 (2000)
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