HFC - R507 An azeotropic blend of R-125 and R-143a intended for low and medium temeperature refrigeration systems. Similar to R-404A in operation, most new equipment has been rated to use either blend. There will be slightly higher pressures and capacity with R-507 compared to R-404A. Retrofit and lubricant comments are similar to those above. Part# Description Deposit 25R507 25 LB. CYLINDER $0 100R507 100 LB. RETURNABLE CYL. $125 1400R507 1,400 LB. RETURNABLE CYL. $2,800 Click here to go back to the Refrigerants page