PROBLEM TO BE SOLVED: To provide high purity ferric citrate not substantially including β iron oxide hydroxide.SOLUTION: Provided is a production method comprising: a step where ferric chloride and sodium hydroxide are contacted in an aqueous medium within 2 hr and also at a liquid temperate in the range of 0 to 10°C to form iron-containing precipitates； a step where citric acid and the iron-containing precipitates are contacted in an aqueous medium, and thereafter, heating is caused to form a ferric citrate aqueous solution； and a step where the ferric citrate aqueous solution and an organic solvent are contacted to precipitate ferric citrate. In the step of forming ferric citrate, preferably, citric acid and iron-containing precipitates are contacted at a liquid temperature of 60 to 100°C, and, preferably, the precipitates including iron being ferrihydrite.SELECTED DRAWING: None【課題】β酸化水酸化鉄を実質的に含有しない高純度クエン酸第二鉄の製造方法の提供。【解決手段】水性媒体中において塩化第二鉄と水酸化ナトリウムと2時間以内且つ0～10℃の範囲の液温で接触させて鉄含有析出物を形成する工程、水性媒体中においてクエン酸と鉄含有析出物とを接触後加熱してクエン酸第二鉄水溶液を形成させる工程、及びクエン酸第二鉄水溶液と有機溶媒とを接触させてクエン酸第二鉄を析出させる工程を含む製造方法。クエン酸第二鉄水溶液形成工程で、クエン酸と鉄含有析出物とを６０～１００℃の液温で接触させることが好ましく、鉄を含有する析出物がフェリハイドライトであることが好ましいクエン酸第二鉄の製造方法。【選択図】なし
