Description

Polyphenylmethyldimethylsiloxane is a specialized silicone fluid engineered with phenyl groups for enhanced thermal stability and compatibility with organic materials. This compound is critical for applications requiring high-performance lubricants, release agents, and additives that must withstand elevated temperatures and harsh chemical environments. It is essential for manufacturers in the aerospace, automotive, plastics, and personal care industries seeking to improve product durability and performance under demanding conditions.

Application

• High-temperature lubricant and grease base fluid for aerospace and automotive components.
• Mold release agent for high-temperature plastics processing (e.g., engineering resins).
• Additive in personal care products (e.g., hair care, cosmetics) for gloss and thermal protection.
• Dielectric fluid and heat transfer medium in specialized electrical applications.
• Plasticizer and processing aid for high-performance silicone and organic polymers.
• Water repellent and surface treatment agent for textiles and coatings.
• Component in damping fluids and vibration dampers.
• Additive for improving the lubricity and stability of industrial oils and greases.

Basic Information

Product Name	Polyphenylmethyldimethylsiloxane
CAS No.	9005-12-3
Molecular Formula	(C6H5C3H6SiO)n(C2H6SiO)m
Molecular Weight	Varies by phenyl content and chain length
Synonyms	Polymethylphenylsiloxane; Phenylmethyl Silicone Fluid; Phenyl Methyl Siloxane; PMPS; Phenyl Modified Silicone Oil; Diphenylsiloxane-dimethylsiloxane Copolymer; Methyl Phenyl Silicone; Silicone Fluid 556
EINECS	Contact for details

Quality Control

Our Polyphenylmethyldimethylsiloxane is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure consistency in viscosity, phenyl content, refractive index, and thermal stability. A Certificate of Analysis (COA) detailing these parameters is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from strong bases and organic solvents. Recommended storage temperature is between 15°C and 25°C. Keep container tightly sealed when not in use to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow viscous liquid
Phenyl Content	As per grade (e.g., 5%, 20%, 40%)
Viscosity (25°C)	50 - 10,000 cSt (grade dependent)
Refractive Index (n20D)	1.460 - 1.550
Specific Gravity (25°C)	0.98 - 1.10
Flash Point	> 200 °C
Volatile Content	< 1.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.