Gelest SIO6615.0

Identification & Functionality

Chemical Family: Silanes
Chemical Name: Octadecyldimethylchlorosilane
Base Chemicals Functions: Intermediate
Molecular formula: C₂₀H₄₃ClSi
Technologies: Base Chemicals & Intermediates
Product Families: Base Chemicals & Intermediates — Intermediates
Other Intermediates
Chemical Structure

Features & Benefits

Features: Contains 5-10% C18 isomers

Employed in bonded HPLC reverse phases

Applications & Uses

Markets: Industrial
Applications: Industrial — Chemical & Industrial Manufacturing
Chemical Manufacturing
Applicable Processes: Chemicals Production

Properties

	Value	Units	Test Method / Conditions
Boiling Point (at 0.1 mmHg)	159.0	°C	—
Melting Point	28 - 30	°C	—

	Value	Units	Test Method / Conditions
Hydrolytic Sensitivity	8 (Reacts rapidly with moisture, water, protic solvents)	—	—
Molecular Weight	347.1	g/mol	—
Purity (including isomers)	97.0	%	—
Density (at 29°C)	0.856	g/ml	—
Refractive Index (at 20°C)	1.4498	—	—

	Value	Units	Test Method / Conditions
C18 Isomers	5 - 10	%	—

Regulatory & Compliance

Chemical Inventories: AICS (Australia),
ENCS (Japan),
IECSC (China),
NDSL (Canada),
TSCA (USA)

Technical Details & Test Data

Alkyl Silane - Conventional Surface Bonding: Aliphatic, fluorinated aliphatic or substituted aromatic hydrocarbon substituents are the hydrophobic entities which enable silanes to induce surface hydrophobicity. The organic substitution of the silane must be non-polar. The hydrophobic effect of the organic substitution can be related to the free energy of transfer of hydrocarbon molecules from an aqueous phase to a homogeneous hydrocarbon phase. A successful hydrophobic coating must eliminate or mitigate hydrogen bonding and shield polar surfaces from interaction with water by creating a non-polar interphase.

Although silane and silicone derived coatings are in general the most hydrophobic, they maintain a high degree of permeability to water vapor. This allows coatings to breathe and reduce deterioration at the coating interface associated with entrapped water. Since ions are not transported through non-polar silane and silicone coatings, they offer protection to composite structures ranging from pigmented coatings to rebar reinforced concrete.

Packaging & Availability

Knowde Enhanced TDS