Methyl Phenyl Silicone Oil M-556

Methyl Phenyl Silicone Oil

Phenyl Methicone — Heat-Resistant Silicone Fluid

Grade: M-556

Methyl Phenyl Silicone Oil (M-556) is a premium heat-resistant silicone fluid with phenyl groups substituting a portion of methyl groups on the silicone backbone. This substitution dramatically improves thermal stability (up to 300°C), radiation resistance, and solubility in organic solvents compared to standard dimethyl silicone oils. Available in phenyl content ranging from 5% to 50%, M-556 is the preferred choice for high-temperature thermal transfer, cosmetic formulations, and precision lubrication.

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Technical Specifications

Chemical NameMethyl Phenyl Silicone Oil
GradeM-556 (Phenyl content 5-50%, customizable)
AppearanceColorless to pale yellow viscous liquid
Viscosity Range10 – 1,000 mm²/s (customizable)
Density (25°C)0.990-1.100 g/cm³ (varies with phenyl content)
Refractive Index (25°C)1.410-1.550 (increases with phenyl content)
Flash Point>280°C
Heat ResistanceUp to 300°C (continuous), peak 320°C
Pour Point-50°C to -20°C (low temperature flexibility)
Packing50kg / 200kg drums, IBC 1000kg, or as requested

Applications

🌡️ Thermal Transfer Systems

High-performance heat transfer medium for oil heaters, thermal oil baths, and industrial heating systems operating up to 300°C.

🧴 Cosmetics & Personal Care

Conditioning agent in hair care products, skin creams, and lipsticks. Provides shine, smoothness, and improved rub-in properties.

⚙️ High-Temperature Lubrication

Precision lubricant for plastic processing equipment, textile machine needles, and high-speed machinery components.

☀️ Radiation Resistance

Used in nuclear and aerospace applications requiring radiation-resistant fluids and sealants.

🏭 Plastic & Rubber Processing

Mold release agent and processing aid for thermoplastics and high-performance rubber compounds.

🧪 Chemical Synthesis

Reaction medium and solvent for specialized chemical synthesis requiring high thermal stability.

Related Products

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Dimethyl Silicone Oil (PDMS) 100–10,000 cst, CAS 63148-62-9 View product → Vinyl Silicone Oil Vinyl-terminated PDMS for LSR and HTV rubber View product → Hydroxy Silicone Oil (107) Hydroxy-terminated fluid for RTV and textiles View product → Dimethyl vs Methyl Phenyl Silicone Oil 10-parameter side-by-side comparison Read guide →
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