1934-16-3 3,7-Bis(ethylamino)-2,8-dimethylphenothiazin-5-ium chloride C.I. Basic Blue 24 (VAN) EINECS 217-696-9 Methylene Blue NN NSC 9605 New Methylene Blue N New methylene blue Phenothiazin-5-ium, 3,7-bis(ethylamino)-2,8-dimethyl-, chloride (8CI)(9CI)