A compound consisting of dark green crystals or crystalline powder, having a bronze-like luster. Solutions in water or alcohol have a deep blue color. Methylene blue is used as a bacteriologic stain and as an indicator. It inhibits Guanylate cyclase, and has been used to treat cyanide poisoning and to lower levels of methemoglobin.
A blue dye, formerly used as a mild urinary antiseptic, now used to treat drug-induced methae-moglobinaemia.
Crystalline powder, used in kidney function tests, as a urinary antiseptic, and in the treatment of cyanide poisoning and certain other disorders.
A dark green dye available as a crystalline powder. It produces a distinct blue stain. It is used for treatment of severe methemoglobinemia.