メチレンブルー 化学特性,用途語,生産方法
外観
暗緑色, 結晶～結晶性粉末
溶解性
エタノールにやや溶けやすく、水に溶けにくく、ジエチルエーテルにほとんど溶けない。
用途
チアジン染料、塩基性染料など。
用途
滴定用指示薬、吸着試験用色素、顕微鏡用色素。
効能
メトヘモグロビン血症治療薬, 解毒薬
化学的特性
Methylene Blue trihydrate is a dark green crystalline powder that has a bronze-like luster. When dissolved in water or alcohol, it creates a deep blue color. Methylene blue is used as a bacteriologic stain and as an indicator. It can also inhibit guanylate cyclase and has been used to treat cyanide poisoning and lower levels of methemoglobin.
使用
Methylene Blue trihydrate finds many uses in biology and chemistry. It acts as a GCS inhibitor, biological stain and redox indicator. It inhibits tau filament formation. Further, it is reported to bind to the M2 subtype of muscarinic receptors in rat cardiac myocytes and thus exhibit antimuscarinic effects on IK, ACh and ICa. It also inhibits endothelium-dependent relaxation of isolated blood vessels.
製造方法
Methylene blue is synthesized commercially by oxidation of N,N-dimethyl-phenylenediamine with sodium dichromate (Na2Cr2O7) in the presence of sodium thiosulfate (Na2S2O3), followed by further oxidation in the presence of N,N-dimethylaniline (NTP, 2008). Methylene blue hydrochloride is isolated by addition of 30% hydrochloric acid and of a saturated common salt solution to the dye solution; after filtration, the product is washed with a 2% common salt solution. Instead of sodium dichromate, manganese dioxide, and catalytic amounts of copper sulfate can be used for the oxidation (Berneth, 2008).
Methylene blue of high purity can be obtained by chloroform extraction of impurities from solutions of raw dye in borate buffer at pH 9.5–10, followed by acidification of the aqueous solution and isolation of the dye (Berneth, 2008).
IARC Monographs
一般的な説明
Methylene blue trihydrate appears as odorless or almost odorless dark green crystals with bronze luster or dark green crystalline powder. pH (1% solution in water) 3 to 4.5. (NTP, 1992)
空気と水の反応
Hygroscopic. Water soluble. Gives a blue solution in water.
反応プロフィール
Methylene Blue trihydrate is incompatible with strong oxidizing agents, caustics, alkali metal iodides and reducing agents. Also incompatible with dichromates. Methylene Blue trihydrate forms double salts with many inorganic salts. Is bleached reversibly by (zinc + hydrochloric acid) or sodium hydrosulfite. In aqueous solution, Methylene Blue trihydrate is decolorized by zinc dust and dilute sulfuric acid, but the color is restored upon exposure to air and more rapidly upon addition of ammonium hydroxide.
火災危険
Flash point data for Methylene Blue trihydrate are not available; however, Methylene Blue trihydrate is probably combustible.
メチレンブルー 上流と下流の製品情報
原材料
準備製品