Chengdu QiYu Gas Co., LTD Company Logo Chengdu QiYu Gas Co., LTD
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C4f8 Octafluorocyclobutane, Perfluorocyclobutane

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Chengdu QiYu Gas Co., LTD

Floor 1, No. 1271, Yinghua Street Chengdu Sichuan
Contact name
Belle Wu

Quick Information

  • Brand Name: QIYU
  • Place of Origin: China
  • Model Number : QY-C4F8-5
  • CAS No. : 115-25-3
  • Purity : 99.999%
  • Einecs No. : 204-075-2
  • MfF : C4F8
  • Molecular Weight : 200.03
  • Grade Standard : industrial grade
  • DOT Class : 2.2


Halocarbon RC318, octafluorocyclobutane, C4F8
Octafluorocyclobutane is a nonflammable, colorless, odorless liquefied compressed gas package in cylinders under its own vapor pressure of 25 psig at 70 °F. This product can cause rapid suffocation when concentrations are sufficient to reduce oxygen levels below 19.5%. Self Contained Breathing Apparatus (SCBA)may be required for rescue workers. Contact with product can cause frostbite.

Physical and Chemical Properties
Melting point -40.2 °C
Boiling point -6.4 °C
Critical temperature 115 °C
Relative density, gas 6.9 (air=1)
Relative density, liquid 1.6 (water=1)
Vapour Pressure 20°C 2.7 bar
Solubility mg/l water 140 mg/l

Product Applications
In the electronics industry, octafluorocyclobutane is mixed with oxygen and used as a plasma etching material for SiO2 layers in semiconductor applications, as oxides are selectively etched versus their metal substrates.
In medicine, octafluorocyclobutane may compose the gas cores of microbubble contrast agents used in contrast-enhanced ultrasound. octafluorocyclobutane microbubbles reflects sound waves well and are used to improve the ultrasound signal backscatter. It is also used in pars plana vitrectomy procedures where a retina hole or tear is repaired. The gas acts to provide a long-term tamponade, or plug, of a retinal hole/tear and allows re-attachment of the retina to occur over the following several days post-op.

Product Parameters
Item  Index
C4F8 ≥99.999%
O2  ≤1.0 ppmv
N2+CO+CO2 ≤4.0 ppmv
H2O ≤2.0 ppmv
HF ≤0.1 ppmv
other F-C ≤2.0 ppmv
total impurities ≤10 ppmv

Packaging & Delivery
Packaging Details: seamless steel gas cylinder
Delivery Detail: about 7~ 30 days after payment received
Cylinder DOT 48.8L DOT 47L 40L 40L 4L
Valve CGA660


  • Price Condition : FOB
  • Price : USD10 / 1 kg
  • Delivery Port : Guangzhou

Packaging & Delivery

  • Packing :cylinder or tank
  • Delivery Lead Time : about 7~ 30 days after payment received
  • Minimum Order : 500kgs
  • Supply Ability : 1000 Kilogram/Kilograms per Week

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