Application: Used as a new foaming agent for rigid polyurethane foam and can be substituted for CFCS which destroys the atmospheric ozone layer. Quality Standard: Cyclopentane, %≥98 Isopentane, %≤0.1 n-Pentane, %≤1.0 2,2 Dimethyl Butane, %≤2.0 Heavy component, %≤0.5 Sulfur, (ppm) ≤5.0 Appearance, Colorless and transparent liquid Package: Steel drum 145KG, ISO tank