Hangzhou Ruijiang Chemical Co., Ltd.
Main products:Pigment, Cosmetic raw, Agro chemicals, Titanium Dioxide, Dyeing chemicals, Food ingredient, Dried fruit
Contact Us
  • Contact Person : Mr. XU KEVIN
  • Company Name : Hangzhou Ruijiang Chemical Co., Ltd.
  • Tel : 0086-0571-88914509
  • Fax : 0086-0571-88854175
  • Address : Zhejiang,Hangzhou,Floor 12th.,No.99,Huaxing Road,Hangzhou,Zhejiang,China
  • Country/Region : China
  • Zip : 310012

Vacuum Pump Oil RJ-275

Vacuum Pump Oil RJ-275
Product Detailed
1. We have been producing Diffusion Pump Oil for 23 years 2. Our RJ-275 is equivalent to DC705 3. Our price is very favorable

Production Description

Chemical structure: 

Equivalent Brand: Dow Corning 705, MT-705, and HIVAC-F-5

Vacuum Diffusion Pump Oil RJ-275 is a colorless to light yellow transparent oily, single-component fluid designed for ultrahigh vacuum applications in the range of  5x (10-9~10-10) torr (untrapped). The vapor pressure and backstreaming rate of RJ-275 is so low that the use of traps or refrigeration is unnecessary for some ultra-high and ultra-clean vacuum applications. It has the highest phenyl content of all silicone diffusion pump oils and the best resistance to radiation.

Technical Index



Chemical composition

Pentaphenyl trimethyl trisiloxane

Ultimate Vacuum, torr


5x (10-9~10-10)

Saturated Vapor Pressure, torr


Specific Gravity

1.090 ~ 1.100

Viscosity (25°C), cSt


Flash Point °C


Refractive Index 25°C


Congealing Point °C

≤-14 ~ -18

Molecular Description



RJ275 is suitable for high vacuum industry, such as high vacuum smelting industry, high vacuum coating in electronic industry, atomic energy accelerators and electronic microscopes and monitors, etc.

Package, Transportation & Storage

Packed in 5KG Plastic Drums, 25KG Plastic drums, 25KG Iron drums or 200KG Iron drums.

Transport as non-hazardous chemicals, keeping away from rain and sunlight.

Shelf life: 3 years. 

Vacuum Pump Oil RJ-275

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