Enviro-Safe does offer an EPA-approved refrigerant (the R-290 pictured above CAS #74-98-6) for use in new food refrigerators and freezers (stand-alone units only), in accordance with EPA regulations at 40 CFR Part 82.
30 lb equivalent cyinders are now available: $180.00 USD total delivered. Call 800-524-5987
Note: This product is Flammable. As with any other flammable products, please use with caution.