50815-73-1 Chlorotrifluoromethane and trifluoromethane azeotropic mixture or Refrigerant gas R 503 with approximately 60 chlorotrifluoromethane [UN2599] [Nonflammable gas] Chlorotrifluoromethane mixt. with trifluoromethane R503 [UN2599] [Nonflammable gas] UN2599