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碘化鈣与碘化钾,如若保存失當,常易受濕潮解,游离碘質,顏色變黄,尤以碘化鈣为甚;處理的辦法,將已經變化的物質,全部化成水溶液,通以硫化氢(H_2S)氣體,使游離碘變為碘氫酸: I_2+H_2S→2HI+S碘氫和液體內游离的鹼性物質(碘化鈣分解為碘及氫氧化鈣,碘化鉀分解為碘及氫氧化鉀),起中和作用,亦可變為碘化鈣或碘化鉀: Ca(OH)_2+2HI→CaI_2+2H_O KOH+HI→KI+H_2O 碘化鈣大都作為注射液的原料,如若已經變質發黄,仍可溶成溶液,通以硫化氫氣體,黄色溶液轉變
Calcium iodide and potassium iodide, if improper preservation, often vulnerable to moisture deliquescence, free iodine, yellow color, especially calcium iodide is even more; treatment approach, will have changed the material, all into an aqueous solution, through the hydrogen sulfide (H 2 S) gas, the free iodine becomes iodohydrin: I 2 + H 2 S → 2HI + S Iodine Hydrogen and free alkaline substances in the liquid (calcium iodide is decomposed into iodine and calcium hydroxide, potassium iodide is decomposed into iodine and hydroxide Neutralization, can also be changed into calcium iodide or potassium iodide: Ca (OH) _2 + 2HI → CaI_2 + 2H_O KOH + HI → KI + H_2O Most calcium iodide as the raw material for injection, if it has been modified Yellow, still soluble in solution, through hydrogen sulfide gas, yellow solution change