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Halocarbon C318, Octafluorocyclobutane

Name: Octafluorocyclobutane
Formula: C4F8
Molecular weight: 200.03
Specific volume: 0.12 m3 /kg @ 21o C
                      1.85 ft3 /lb @ 70o F
CAS Registry Number: 115-25-3
UN Number: UN 1976
DOT Proper Shipping Name: Octafluorocyclobutane
DOT Classification: 2.2, Nonflammable
Grades: Custom grades available to 99.999%

Cylinder information:

Cylinder Size**

  Valve  Connection

Pressure psig@21oC

Content US

Content Metric


DISS 716, CGA 660


110 lb

50 kg


DISS 716, CGA 660


35 lb

16 kg


DISS 716, CGA 660


15 lb

6.8 kg

     **SCP fills customer owned cylinders. This is a sample of common cylinders sizes.**

Applications: Semiconductor; etching of silicon oxides & CVD/PECVD chamber clean, propellant and aerating agent in foamed or sprayed food products, dielectric blend with SF6, media of polymerization of fluorine-contained polymers.

Additional information: Halocarbon C318 (octafluorocyclobutane) (C4F8) is a colorless, nonflammable, nontoxic, odorless gas. Halocarbon C318 is shipped as a liquefied gas under its own vapor pressure (25 psig @ 21C).

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