1, 3-Benzenedisulfonic acid, {4-[[4-(ethylamino)-3-methylphenyl][4-(ethylimino)-3-methyl-2,} 5-cyclohexadien-1-ylidene\]methyl\]-6-hydroxy-, monosodium salt 4-((4-(Ethylamino)-3-methylphenyl)(4-(ethylimino)-3-methyl-2,5-cyclohexadien-1-ylidene)methyl)-6-hydroxy-1,3-benzenedisulfonic acid 4463-44-9 (DISODIUM SALT) AIDS-156169 AIDS156169 C.I. 43535 Cyanol FF NSC239328 (DISODIUM SALT) Toluene-2,4-disulfonic acid, .alpha.-[4-(ethylamino)-m-tolyl]-.alpha.-[4-(ethylimino)-3-methyl- 2,5-cyclohexadien-1-ylidene]-5-hydroxy- Toluene-2,4-disulfonic acid, {.alpha.-[4-(ethylamino)-m-tolyl]-.alpha.-[4-(ethylimino)-3-methyl-} 2,5-cyclohexadien-1-ylidene\]-5-hydroxy-, monosodium salt