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Sigma-Aldrich

Trimethoxy(octyl)silane

96%

Synonym(s):

Octyltrimethoxysilane

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About This Item

Linear Formula:
CH3(CH2)7Si(OCH3)3
CAS Number:
3069-40-7
Molecular Weight:
234.41
Beilstein:
1926957
EC Number:
221-338-7
MDL number:
MFCD00043053
UNSPSC Code:
12352103
PubChem Substance ID:
24863429
NACRES:
NA.23
Pricing and availability is not currently available.

Assay

96%

form

liquid

refractive index

n20/D 1.416 (lit.)

density

0.907 g/mL at 25 °C (lit.)

SMILES string

CCCCCCCC[Si](OC)(OC)OC

InChI

1S/C11H26O3Si/c1-5-6-7-8-9-10-11-15(12-2,13-3)14-4/h5-11H2,1-4H3

InChI key

NMEPHPOFYLLFTK-UHFFFAOYSA-N

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General description

Trimethoxy(octyl)silane (TMOS) is an organosilane that is used as a coupling and surface modifying agent to enhance the water contact angle and lower the surface energy.[1][2]
Trimethoxy(octyl)silane is an organosilane. The effect of hydrolyzed silane on the penetration of water into a lamellar liquid crystal was studied.[3]

Application

Trimethoxy(octyl)silane (TMOS) is used to functionalize the surface of silica to promote the adhesion with gold nanoparticles (AuNPs) for use in the fabrication of acrylate nanocomposite based photonic devices.[4] It can be coated on silica fiber based epoxy to improve the hydrophobic characteristics and to protect the surface from corrosion.[2][5]
Trimethoxy(octyl)silane was used for the silanization of silica nanoparticles.[6] Surface modification of hydrophobic (T805) titania particles with the silane was reported. [7]

Pictograms

Skull and crossbones
GHS06

Signal Word

Danger

Hazard Statements

H315,H331

Hazard Classifications

Acute Tox. 3 Inhalation - Skin Irrit. 2

Storage Class Code

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 1

Flash Point(F)

203.0 °F - closed cup

Flash Point(C)

95 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCBW7961
BCBF1594V
1451612V
1451612
0001181503

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Controlled synthesis of hierarchical ZSM-5 for catalytic fast pyrolysis of cellulose to aromatics.
Chen H, et al.
Journal of Material Chemistry A, 6(42), 21178-21185 (2018)
Ruixia Gao et al.
Talanta, 150, 46-53 (2016-02-04)
In this work, a novel Cu(2+)-mediated core-shell bovine hemoglobin imprinted superparamagnetic polymers were synthesized. First, carboxyl group directly-functionalized Fe3O4 nanoparticles were produced by a facile one-pot hydrothermal method. Next, copper ions were introduced to chelate with carboxyl groups and further
Ziling Peng et al.
Chemosphere, 201, 110-118 (2018-03-09)
Usually, nanoscale zero-valent iron (NZVI) cannot float on water because of high density and hydrophilic surface. Herein, alkyltrimethoxysilanes with different carbon chain lengths (C1, C8 and C16) were used as "water-repellent legs" to graft onto NZVI, enduing NZVI with hydrophobic
Qinzhi Wang et al.
Analytica chimica acta, 1049, 170-178 (2019-01-08)
In the present work, highly sensitive Raman detection of nitenpyram using superhydrophobic filter paper as substrates is introduced. The process is simple, and efficient. By sequentially coating silver dendrites and Octyltrimethoxysilane (OTMOS) on filter paper, we produced highly active surface-enhanced
XPS and FTIR surface characterization of TiO2 particles used in polymer encapsulation.
Langmuir, 17(9), 2664-2669 (2001)
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  1. How is shipping temperature determined? And how is it related to the product storage temperature?

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    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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