Identification
Synonyms:Freon C318; Halocarbon C318; Perfluorocyclobutane; RC-318
CAS No.: 115-25-3
Molecular Weight: 200.0312
Molecular Formula: C4F8
Structural Formula:
b.p. (1 atm): -5.8°C
m.p.: -93.6°C
Density of liquid (25°C): 1.5g/ml
ODP: 0
Application
C318 is used as propellant in food industry, refrigerant, cleaning agent, dielectic (mixture with SF6); media of polymerization of fluorine-contained polymers; etchant of IC.
Specifications

Parameters	specification
octafluorocyclobutane content, %	99.5 min
moisture, mg/kg	40 max
acidity, mg/kg	1 max
non-volatile residues, %	0.01 max
apprearance	clear colorless liquefied gas

Standard Packing steel cylinder; filling ratio 1.296kg/l
Risks and Safety Info Non flammable liquefiable gas; Class 2.2; UN 1976