Trimethoxy(octadecyl)silane

Basic Information

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CAS Number

3069-42-9

Molecular Formula

C21H46O3Si

Molecular Weight

374.68 g/mol

Chemical Classification

Polymers and Plastics Thermoplastics Polyolefins

Basic Physical Properties

Melting Point

16-17 °C

Boiling Point

170 ºC (0.1 mmHg)

Refractive Index

n20/D 1.439(lit.)

SMILES

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CCCCCCCCCCCCCCCCCC[Si](OC)(OC)OC

InChI

InChI=1S/C21H46O3Si/c1-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21-25(22-2,23-3)24-4/h5-21H2,1-4H3

InChIKey

SLYCYWCVSGPDFR-UHFFFAOYSA-N

LogP

7.126000000000007

Topological Polar Surface Area

27.69 Å²

Hydrogen Bond Donor/Acceptor

0 / 3

Complexity

249

Safety Information

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GHS Hazard Pictograms

H315

H319

H335

Hazard Statement

H315 Causes skin irritation
Skin corrosion/irritation

H319 Causes serious eye irritation
Serious eye damage/eye irritation

H335 May cause respiratory irritation
Specific target organ toxicity, single exposure; Respiratory tract irritation

Stability

Stable. Incompatible with strong oxidizing agents. Moisture sensitive.

Sensitiveness

Sensitive to humidity

Synonyms & References

English

Stearyltrimethoxysilane
Ctadecyltrimethoxysilane
N-Ctadecyltrimethoxysilane
Trimethoxyoctadecylsilane
A5R7Q56VX6
Q10859606
SLYCYWCVSGPDFR-UHFFFAOYSA-N
J-018070
AY 43-218MC
AS-12263
NS00045615
O-0256
Ctadecyl-Trimethoxysilane
DYNASYLAN 9118
AMY42261
Trimethoxy(octadecyl)silane
KH-311
EINECS 221-339-2
CS-0006245
N-Ctadecyltrimethoxysilane97%
TSL-8185
Trimethoxy (Octadecyl) Silane
3069-42-9
Trimethoxy(Ctadecyl)Silane
LSX-6817
A820569
Aksci Technical GradeCtadecyl-Trimethoxysilane
O0256
N-Ctadecyl Trimethoxysilane
TSL-8186
n-Octodecyltrimethoxysilane

MDL Number

MFCD00043060

Customs Code

2931900090

FAQ

What is Trimethoxy(octadecyl)silane (CAS: 3069-42-9)?

Trimethoxy(octadecyl)silane (CAS: 3069-42-9) is a colorless, viscous liquid with the chemical formula C23H50O3Si. It features a silane backbone with three methoxy groups and an octadecyl chain, making it a versatile coupling agent. This compound is commonly used for surface modification and exhibits low reactivity under normal conditions, with a molecular weight of approximately 400 g/mol.

What are the main uses of Trimethoxy(octadecyl)silane (CAS: 3069-42-9)?

Trimethoxy(octadecyl)silane (CAS: 3069-42-9) is primarily used as a coupling agent in pharmaceuticals, coatings, and materials science. It facilitates the creation of silane-based coatings, enhances adhesion in composite materials, and is applied in research for functionalizing surfaces. Its octadecyl group also makes it suitable for hydrophobic modification in industrial applications.

Is Trimethoxy(octadecyl)silane (CAS: 3069-42-9) safe?

Trimethoxy(octadecyl)silane (CAS: 3069-42-9) is generally considered safe when handled properly, but it requires standard chemical safety precautions. Toxicity data indicates low acute toxicity, though prolonged skin contact or inhalation may cause irritation. Always use gloves, ensure adequate ventilation, and follow OSHA guidelines for safe handling and disposal.

How should Trimethoxy(octadecyl)silane (CAS: 3069-42-9) be stored?

Trimethoxy(octadecyl)silane (CAS: 3069-42-9) should be stored in a cool, dry place, away from light and moisture. Keep in tightly sealed containers at temperatures below 25°C to maintain stability. Avoid exposure to heat sources and store in a well-ventilated area to prevent potential evaporation or contamination.