1,3-Benzenedisulfonic acid, 4-[[4-(ethylamino)-3-methylphenyl][4-(ethylimino)-3-methyl-2,5-cyclohexadien-1-ylidene]methyl]-6-hydroxy-, monosodium salt 4463-44-9 C.I. 43535 Cyanol FF NSC239328 Toluene-2,4-disulfonic acid, .alpha.-[4-(ethylamino)-m-tolyl]-.alpha.-[4-(ethylimino)-3-methyl-2,5-cyclohexadien-1-ylidene]-5-hydroxy-, monosodium salt