Products Description
What is Polymethylphenylsiloxane Heat Exchange Fluid CAS 63148-58-3 ?
Polymethylphenylsiloxane (CAS 63148-58-3), also known as Methyl phenyl silicone oil or high-temperature silicone oil, is a silicone polymer with a molecular structure based on a siloxane backbone and alternating phenyl (-C₆H₅) and methyl (-CH₃) side groups. Its general formula is (C₇H₈OSi)ₙ (where n denotes the degree of polymerization), forming a colorless to light yellow transparent viscous liquid at room temperature.
Polymethylphenylsiloxane exhibits low viscosity and low surface tension, with a density of 1.05–1.11 g/mL (25°C) and refractive index of 1.42–1.5365 (varying with phenyl content and molecular weight). It demonstrates excellent thermal stability, maintaining performance in the temperature range of -50°C to +350°C, with a flash point ≥270°C (open cup) and boiling point >140°C (0.002 mmHg).
Basic Info
Polymethylphenylsiloxane Heat Exchange Fluid CAS 63148-58-3
| Product Name | Silicone oil (high temperature) |
| CAS | 63148-58-3 |
| MF | C4H12OSi |
| EINECS | 613-153-9 |
| Appearance | white liquid |
| Boiling point | >140 °C0.002 mm Hg(lit.) |
| density | 1.102 g/mL at 25 °C(lit.) |
| vapor density | >1 (vs air) |
| vapor pressure | <5 mm Hg ( 25 °C) |
| refractive index | n20/D 1.5365(lit.) |
| Fp | 620 °F |
Uses
Industrial Field
High-Temperature Lubrication: Polymethylphenylsiloxane Used in mechanical parts under extreme temperatures, such as vacuum pumps and diffusion pump oils (Type 275), where it provides long-term lubrication without degradation.
Electrical Insulation: Serves as transformer oil and capacitor oil due to its high dielectric strength and low volatility, ensuring reliable insulation in electrical devices.
Demolding & Defoaming: Acts as a demolding agent in rubber and plastic processing, reducing adhesion to molds, and functions as an industrial defoaming agent to eliminate unwanted bubbles in manufacturing processes.
Car Care
Emulsion-based formulations are applied for tire polishing and dashboard maintenance, forming a hydrophobic protective film that resists water, dust, and UV degradation.
Safety Information
Hazard: Flammable, but with extremely high flash point (>270°C), low fire risk.
Storage: Store in a cool and dry place to avoid contact with strong oxidants.
Company Profile
Gneebio is an enterprise specialising in the research, development, production and sales of phytochemicals and fine chemicals.Our factory was established in 2021 and is located in Henan Province, covering an area of 3,600 square metres. We have a professional, well-equipped and high-quality R&D team with more than 10 years of R&D experience. Our reagent products are widely exported to many countries including the United States, Kazakhstan, Canada, Australia, Europe, etc., and we provide fast shipping services to our customers. We hope to establish long-term and mutually beneficial cooperation with more friends in the future and provide the best products and services for our customers.
Contact Us
Tel: +86-372-5055135
Mob: +86-13673325456
Email: wendy@gneebio.com
FAQ
Can your company accept customisation and meet customers' special specifications?
Yes, we can.
What are your payment terms?
Wire transfer, paypal, western union, money order and bitcoin.
What is your delivery time?
We usually ship within 1-3 days after receiving your payment.
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