Safety Safety Safety Data Sheets (SDS) Dynatemp R22 Dynatemp 134a HVAC & AUTO Dynatemp 404A Dynatemp 407A Dynatemp 407C Dynatemp 410A Choice™ R-421A Choice™ R-421B Dynatemp R-422B Dynatemp R-422D Arkema 427A ComStar® RS-45 (R434A) ComStar® RS-44b (R453A)