Methylene Blue, methylthionine chloride or 3,7-bis(dimethylamino)phenothiazin-5-ium chloride is a chemical compound used as a dye and medication for Gram's stain, Wright stain[?], and the treatment of metoxyhemoglobinemia.
... February 11 - Sir Keith Holyoake, New Zealand Prime Minister (1960-1972)
February 20 - Alexei Kosygin[?], Premier of the Soviet Union[?] (+ 1980)
February 25 - ...