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