3-Hydroxy-2,7-naphthalenedisulfonic acid, compd. with ethanaminium,N-(4-((4-(diethylamino)phenyl)(4-(ethylamino)-1-naphthalenyl)methylene)-2,5-cyclohexadien-1-ylidene)-N-ethyl- (1:2) 73003-89-1 Ethanaminium, N-(4-((4-(diethylamino)phenyl)(4-(ethylamino)-1-naphthalenyl)methylene)-2,5-cyclohexadien-1-ylidene)-N-ethyl-, salt with 3-hydroxy-2,7-naphthalenedisulfonic acid (2:1)