DESCRIPTION Maxron R-290 refrigerant gas is a brand-new product with a higher concentration of solvents that produce the highest proportion of refrigerant. If you use Maxron, the high concentration produces more cold air. It�s not just the best but it also saves you money. Physical and Chemical� Properties Appearance : Colorless, liquefied compressed gas Physical State: Gas at ambient temperature Odor: Odorless Solubility in Water: 0.0244 g/liter Boiling Point: -43.2 F (-41.79?C) Vapor Pressure : 109 psig Flash Point : -104?C (-155?F)