AQUEOUS SOLUTION OF CHROMIUM SALT AND METHOD FOR PRODUCING SAME

摘要

Disclosed is an aqueous solution of a chromium salt, in which the oxalic acid content is 8% by weight or less relative to chromium. In the aqueous solution of the chromium salt, the total organic carbon content is 4% by weight or less relative to chromium. The chromium salt is preferably a chromium chloride, a chromium phosphate, or a chromium nitrate. The chromium chloride preferably contains a basic chromium chloride represented by the composition formula Cr(OH) x Cl y (wherein 0 < x ‰¤ 2, 1 ‰¤ y < 3, and x + y = 3). The chromium phosphate is preferably one represented by the composition formula Cr(H 3-3/n PO 4 ) n (wherein n is a number satisfying 2 ‰¤ n ‰¤ 3). The chromium nitrate is preferably a basic chromium nitrate represented by the composition formula Cr(OH) x (NO 3 ) y (wherein 0 < x ‰¤ 2, 1 ‰¤ y < 3, and x + y = 3).