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Merck
CN

40955

Methoxy(dimethyl)octadecylsilane

technical, ≥90% (GC)

Synonym(s):

Dimethylmethoxyoctadecylsilane, Dimethyloctadecylmethoxysilane, Octadecyldimethylmethoxysilane

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About This Item

Empirical Formula (Hill Notation):
C21H46OSi
CAS Number:
71808-65-6
Molecular Weight:
342.67
EC Number:
276-039-4
UNSPSC Code:
12352103
PubChem Substance ID:
57650036
Beilstein/REAXYS Number:
7346074
MDL number:
MFCD00042920

Key Documents

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InChI key

RUFRLNPHRPYBLF-UHFFFAOYSA-N

InChI

1S/C21H46OSi/c1-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21-23(3,4)22-2/h5-21H2,1-4H3

SMILES string

CCCCCCCCCCCCCCCCCC[Si](C)(C)OC

grade

technical

assay

≥90% (GC)

form

solid

impurities

5-10% other C18-isomers

density

0.83 g/mL at 25 °C (lit.)

General description

Methoxy(dimethyl)octadecylsilane(MDOS) is an organosilane with one methoxy group. It is a silane coupling agent which forms a self-assembled monolayer(SAM) on a variety of particles.

Application

MDOS can be used as an adhesion promoter between wool fiber and the polyethylene matrix that can be used to conserve waste of wool and poultry feathers. Wood fibre silanized with MDOS can be used as reinforcement to prepare polyethylene based composites with improved thermo-oxidative stability.
Silica spheres for HPLC colums were reported to be functionalized with methoxy(dimethyl) octadecylsilane. 1 Methoxy(dimethyl) octadecylsilane may be grafted on the surface of ZnO nanoparticles. 2

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

235.4 °F - closed cup

flash_point_c

113 °C - closed cup

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCK6158
BCBS6866V
BCBQ5311V
BCBQ2869V
BCBK9136V

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Wool fibres functionalised with a silane-based coupling agent for reinforced polypropylene composites.
Conzatti L, et al.
Composites Part A: Applied Science and Manufacturing, 61, 51-59 (2014)

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