13780-03-5 13846-18-9 CALCIUM BISULFITE Calcium bisulfite, solution Calcium dithionite or calcium hydrosulfite [UN1923] [Spontaneously combustible] Calcium hydrogen sulfite Calcium hydrogensulphite Calcium sulfite (Ca(HSO3)2) (7CI) EINECS 237-423-7 Sulfurous acid, calcium salt (2:1) UN1923