Gold Member Since 2007
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Anhui Gusheng Import & Export Co., Ltd.

Diffusion Pump Oil, Diffusion Pump Fluid, Silicone Oil manufacturer / supplier in China, offering Silicone Diffusion Pump Oil Dfso705 (Replaces Dow Corning DC705), Matt Hardener for Hybrid Powder Coatings, Matting Agent for Tgic Powder Coatings and so on.

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Silicone Diffusion Pump Oil Dfso705 (Replaces Dow Corning DC705)

FOB Price: US $25-60 / kg
Min. Order: 1 kg
Min. Order FOB Price
1 kg US $25-60/ kg
Get Latest Price
Port: Shanghai, China
Production Capacity: 100mt/Year
Payment Terms: L/C, T/T, Western Union, Paypal, Money Gram
Basic Info
  • Model NO.: DFSO705
  • Source: Silicone Oil
  • Property: High Vacuum Oil
  • Shape: Liquid
  • Trademark: BEST
  • Specification: DFSO705(Equal toDow Corning DC705)
  • Type: Diffusion Pump Oil
  • Composition: Trimethyl Pentaphenyl Trisiloxane
  • Certification: SAE, ACEA, NSF, JASO
  • Application: Industrial Lubricant
  • Transport Package: 5kg/Drum,10kg/Drum,25kg/Drum,200kg/Drum(as Demand)
  • Origin: China
Product Description
A:Product Description
Silicone Diffusion Pump Oil Dfso705 (Replaces Dow Corning DC705)
BESTTM DFSO 702 Silicone Diffusion Pump Oil (equal to Dow Corning 702)
BESTTM DFSO 704 Silicone Diffusion Pump Oil (equal to Dow Corning 704)
BESTTM DFSO 705 Silicone Diffusion Pump Oil (equal to Dow Corning 705)

Silicone Diffusion Pump Oil Dfso705 (Replaces Dow Corning DC705)

DFSO Series Premium-Grade Silicone Diffusion Pump Oil 

BESTTM BRAND offers the #1 selling brand of silicone diffusion pump oil in China. 
Not only our products are being used in China, But also our premium-grade silicone diffusion pump oil is being used worldwide by numerous manufacturers or agents including the United States, Europe (mainly Germany, France, Italy, and more), Russia, India, and more. Our diffusion pump oil is priced affordably and exceeds international standards. 

We're extremely proud of our DFSO Series diffusion pump oils. Not only our highest quality in China, but also our diffusion pump oil has been independently tested and approved by various large scale, well-known manufacturers in the vacuum industry. Wether you choose our DFSO 702, 704, or 705 series, you're assured that its the best replacement for Dow Corning's DC 702, 704, and 705.


Molecular Description
Mixed phenylmethyl 
dimethyl cyclosiloxane
trimethyl trisiloxane
AppearanceColorless clear liquid
Ultimate Untrapped Vacuum(torr)  10E-6 torr10E-7 to 10E-8 Torr10E-9 to 10E-10 torr
Specific Gravity at 25 ºC1.071.071.09
Viscosity at 25 ºC4539175
Flash Point, (ºC)Min.195Min.210Min.240
Boiling point, (ºC)(open cup)180215245
Refractive Index at 25ºC1.5550 - 1.56501.5500 - 1.56001.5765 - 1.5785
Surface Tension (dynes/cm)3037.336.5
Heat of Vaporization (kcal/g mole)21.7/190ºC25.5/200ºC28.2/250ºC
Shelf Life5 Years5 Years5 Years
Hazardous IngredientsNoneNoneNone
Model Vacuum RangeOptimal Temperature
DFSO70210E-5 to 10E-6 Torr180-190 °C
DFSO70410E-7 to 10E-8 Torr220-230 °C
DFSO705 10E-9 to 10E-10 Torr245-255 °C

C:Infrared Spectrum Detection for DFSO 705 Silicone Diffusion Pump Oil
   Silicone Diffusion Pump Oil Dfso705 (Replaces Dow Corning DC705)


Testing results:
        Batch No. :16092601 (Testing date:Oct.08,2016)
        Trimethyl pentaphenyl trisiloxane:98.36%
        Dimethyl tetraphenyl disiloxane:1.64%

1:If need to know more about this testing,please contact us.
2:Our series testing results can make you know more about our quality,also can gurantee our silicone diffusion pump oil do not have  Methyl triphenyl silane(Which can bring
crystallization problem)

D:About Us

                       Silicone Diffusion Pump Oil Dfso705 (Replaces Dow Corning DC705)   BESTTM 

  Professional Manufacturing
  Advanced equipment
  Qualfied technicians
  Premium quality


Our main businesses include research, development, production, sales, application and promotion of new fluorine and silicone materials. We are the first manufacturer of Silicone diffusion pump Oil and Perfluoropolyethers (PFPE) with the independent intellectual property rights in China.

We have very strong strength in R&D. We have about 20 outstanding scientists with Doctor or Master Degrees in research and development of new fluorine and silicone materials from both here and abroad. 

Our company has obtained ISO certification. Meanwhile, we have SGS certifications for the products,the quality of our products can conform to the standards of RoHs. The indexes of over-all properties of our products can conform to the standards of the same products from overseas, some indexes are even much better than overseas products.

Profession creates excellent. We are looking forward to developing and expanding together with you!  

Silicone Diffusion Pump Oil Dfso705 (Replaces Dow Corning DC705)
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