메틸렌 블루, methylene blue (= methylthioninium chloride) > Redox indicator grade suitable for biological work. > Dark green or brown crystals with bronze lustre or crystalline powder; hygroscopic; soluble in water and in chloroform; sparingly soluble in ethanol; insoluble in ether. > Dissolve 150 mg of methylene blue in 100 mL of ethanol ...