B 1234 (OTTO) Barium acetate, 98% Cas 543-80-6 - used as a mordant for printing textile fabrics, for drying paints and varnishes and in lubricating oil. B 1234 (OTTO) Barium acetate, 98% Cas 543-80-6 - used in the preparation of other acetates; and as a catalyst in organic synthesis.