Refrigerant R508B, widely use in ultra-low temperature, azeotropic refrigerant blend made of R-23 and R-116. Machine like Ultra-Low Temperature (ULT) Lab Freezers from Thermo Fisher Scientific is heavily rely on this R508B to provide ultra low temperature for keep highly sensitive mRNA vaccines stable over long periods, long-storage of blood plasma etc. and clinical trials. 
As per this case, the cylinder is supplied in Batu Kawan Penang, in time and fits condition. These types of refrigerants can be sourced from our company and we meant to keep them for urgent application.