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LS-618 Octaphenylcyclotetrasiloxane 546-56-5 - Silfluo

Phenyl Siloxane LS-618

Product Code: Silfluo LS-618

Chemical Name Octaphenylcyclotetrasiloxane
CAS Number 546-56-5
Product Form Powder
Synonyms Octadecylcyclosiloxane; DP4; Phenyl D4; Octadecyl cyclosiloxane

Technical Specifications

PARAMETER VALUE / RANGE
Appearance: Fine white powder
Molecular Weight: 793.1708
Melting Point: 190~200°C
Boiling Point: 334°C
Flash Point: 200°C
Solubility: Insoluble in water, soluble in ordinary chemical solvents.

Product Description

LS-618 Phenyl D4 is a solid with very high thermal stability. It has properties like high and low temperature, radiation resistance and aging resistance.

It is the primary precursor (intermediate) used to introduce diphenyl siloxane units into the polymer chain during the synthesis of high-performance silicone rubbers and resins.


Applications

  • Synthesis of Phenyl Silicone Rubber (PVMQ): It is used as a monomer in the ring-opening polymerization process to synthesize high-phenyl content silicone polymers. It imparts radiation resistance, high temperature stability, and high refractive index to the final rubber.
  • Crosslinker & Additive: Acts as a crosslinking agent for silicone resins to improve thermal stability and mechanical strength.
  • Flame Retardant: Used as a synergistic flame retardant additive in thermoplastic resins (like PC/ABS) due to its high thermal decomposition temperature.

Application Scenarios

Automotive & New Energy (EV) Semiconductor & Optoelectronics Consumer Electronics

Packaging & Handling

In 20kg plastic drum or other customized package.

Keep in cool, dry and ventilated place. Keep away from sunlight and fire sources. Keep in unopened containers. Storage beyond the shelf life does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.

Ready to work with Silfluo?

From 1-gram laboratory trials to 1,000+ kg production runs. Full CoA, SDS, REACH/TSCA documentation included. Laboratory samples available within days.

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