Siloxanes | Cyclosiloxanes | Organosiloxanes | Cyclic Siloxanes | Phenyl Siloxane

SiSiB® PC9181

Synonym: Tetraphenyltetramethylcyclotetrasiloxane;

Chemical Structure


The word siloxane is derived from the words silicon, oxygen, and alkane.

Typical Physical Properties

Chemical Name: Tetramethyltetraphenylcyclotetrasiloxane
CAS No.: 77-63-4 or 1693-47-6
EINECS No.: 201-045-0
Empirical Formula: C28H32O4Si4
Molecular Weight: 544.89
Boiling Point: 493°C [760mmHg]
Flash Point: N/A°C
Color and Appearance: Colorless or yellowish transparent liquid
Density [25°C]: 1.13
Refractive Index [25°C]: N/A
Purity: 97% by GC


SiSiB® silanes are versatile materials used in a wide range of applications including:
Silane Coupling Agent, Silane Adhesion Promoter, Silane Hydrophobing Agent, Silane Dispersing Agent, Silane Crosslinking Agent, Silane Moisture Scavenger, Polypropylene Catalyst "Donor" Silane, Silicate Stabilizer, Polyurethane Endcapper Silane, Silane Drying Agent, Silane Curing Agent, Silane Reinforcer, Silylating Agent, Silane Reducing Agent, Silyl Building Blocks and Synthons etc.

SiSiB® siloxanes are widely used in cosmetics, deodorant, water repelling windshield coating, food additives and some soaps.


Net weight 200Kg steel drum, for more details, please visit Packing Centre.

Technical Library

Download Technical Data Sheet Safety Data Sheet 中文


Download SiSiB® SILANES & SILICONES 2014
Guide SiSiB® SILANE Selection Guide Guide SiSiB® SILANE Cross Reference Guide