High-PurityFC-C318
C4F8
Octafluorocyclobutane
PropertiesandClassification
Appearance:Colorlessandodorlessgas
UNNumber:1976
CASNumber:115-25-3
Liquefiedgas
*RefertoMSDSfordetailedinformationonthepropertiesandsafetyoftheproduct.
Specification
Purity
vol%
Min.99.999
Water
volppm
Max. 10
AcidsasHF
volppm
Max.
1
Otherfluorocarbons
volppm
Max.
4
N2＋O2
volppm
Max. 20
Item
Size
47Lcylinder
Insidediameter
140mm ﾙ
232mm ﾙ
Height(totheneckportion)
850mm ﾙ
1370mm ﾙ
1000mm ﾙ
1520mm ﾙ
Height(withaprotectivecap)*
Cylinder
10Lcylinder
Valvenozzleheight(center)*
875mm
5kg,10kg
Loadingweight
1380mm
30kg,50kg
Manganesesteel
Material
＊Estimatedvaluesforwhenastandardvalveismountedonastandardcylinder.
Theaccuracyofthesevaluesisnotguaranteed.
Valve
Nozzlesize
φ22mmX14right-handthreads
Material
BRASS
HP-FC-C318 page01（1998SDK-CT）
High-Purity FC-C318
C4F8
Oc tafluoroc yc lobutane
Physical & Chemical Properties
Item
Unit
Data
Chemical formula
C4F8
Molecular weight
200.03
Boiling point
℃
。
Ｆ
−5.75
−21.5
Melting point
℃
−41.4
Liquid density (0°C, saturated liquid)
kg/L
1.6
Gas density (0°C, saturated liquid)
g/L
12.03
Specific gravity (air: 1)
6.9
Critical temperature
Critical pressure
℃
115.22
MPa
2.7
kg/cm2
27.5
Flammability
Not applicable
Toxicity
Not applicable
Latent heat of vaporization (0°C, 1013 MPa)
kJ/kg
Maximum permissible concentration (ACGIH)
246.7
ppm
Explosive limit (in air, 35°C, 101.3 kPa)
Temperature − Vapor Pressure Curve
10
P.C.
C.P.
1
0.1
Vapor
pressure
(MPa)
0.01
-40
-30
-20
-10
0
＋10
＋20
＋30
＋40
＋50
Temperature（℃）
HP-FC-C318 page 02（1998SDK-CT）
＋60
＋70
＋80
＋90
＋100
＋110
＋120