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High-purity isopentane
High-purity isopentane

High-purity isopentane
Executive standard: Q/JBG 0002—2007
R601a
Molecular formula: C5H12
Quality standard

Item Quality index
Superior product Qualified product
Appearance Colorless transparent liquid Colorless transparent liquid
Mechanical impurities and moisture None None
Water soluble acid or alkali None None
Component of C4 and below %≦ 0.025 0.05
Isopentane%≧ 99.9 99.0
n-pentane%≦ 0.05 0.9
Heavy components of C6 and above %≦ 0.025 0.05
Copper corrosion (20℃, 3h) grade≦ 1 1
Sulphur contentw,10-6≦ 0.5 1
Acidity     w, 10-6 1 5
Residue mg/100ml 0 0.01
Bromine index mgBr/100g≦ 50 100

Physical properties:

Appearance Colorless transparent liquid with a little aromatic odor
Boiling point (101.3kpa) 27.85
Relative density (2℃)g/cm3 0.62
Flash point℃ -56
Autoignition temperature℃ 420
Explosion limits (vol) 1.4-8.3%
Fire hazard classification B

Uses: as refrigerant, or as foamer in the production process of expandable polystyrene and flexible polyurethane.
Packing: 125kg/208L galvanized iron bucket; tank car: 15T, 18T, or 30T