Freon 23 refrigerant 

DuPont™ Freon® 23 is an HFC retrofit refrigerant for R-13 and R-503 in very low temperature applications [ below -40° F to -100° F ( -40° C to -73° C) ] such as medical freezers and environmental chambers. It can be used in new systems as well as to retrofit existing systems.

ASHRAE

R-23; A1 Safety Classification

Replaces

R-13 and R-503

Benefits

Can be used where high compressor discharge temperature is not a concern.

Applications

Very Low Temperature ( VLT) [ below -40° F to -100° F ( -40° C to -73° C) ] :

medical freezers
environmental chambers

Phaseout Schedule
Consult the specific regulations in your country or region.

Lubricant Recommendation
POE