Cerin

{ Ceresin (also cerin, cerasin, cerosin, ceresin wax or ceresine) is a wax derived from ozokerite by a purifying process. The purifying process of the ozokerite commonly comprises a treatment with heat and sulfuric acid, but other processes are also in use. Uses include: An alternative to beeswax in ointments (Historic) laboratory-supply bottles for small amounts of hydrofluoric acid, which were made of ceresin wax; this was before polyethylene became commonplace. {