Calcium nitrate tetrahydrate, gran grade: ACS CAS Number: 13477-34-4 synonym(s): Nitric Acid, Calcium Salt, Tetrahydrate; Norwegian Saltpeter Tetrahydrate; Calcium Dinitrate Tetrahydrate; Lime Nitrate Tetrahydrate; Nitrocalcite Tetrahydrate; Lime Saltpeter Tetrahydrate 1kg