56275-41-3 Dichlorodifluoromethane and difluoroethane azeotropic mixture or Refrigerant gas R 500 with approximately 74 dichlorodifluoromethane [UN2602] [Nonflammable gas] Methane, dichlorodifluoro- mixed with 1,1-difluoroethane R500 [UN2602] [Nonflammable gas] UN2602