Name: Synthetic Cryolite Formula: Na3AlF6 M.W.: 209.95 Specification: GB/T4291-2007 Density: 2.95-3.05g/cm3 CAS: 15096-52-3 HS Code: 28263000. In plastic coating woven bags with plastic film and paper bags inside, 25kgs, 50kgs or 1000kgs net each, or as the requirement of clients.