4978 C.I. Food Red 1 Colourant ormerly used in foodstuffs. 4548-53-2 C18H16N2O7S2 White powder. 3, not classifiable as to its carcinogenicity to humans. (L135) 2014-09-11T05:22:40Z 2026-04-03T08:53:30Z true CC1=CC(C)=C(C=C1\N=N\C1=C(O)C2=CC=CC=C2C(=C1)S(O)(=O)=O)S(O)(=O)=O C18H16N2O7S2 InChI=1S/C18H16N2O7S2/c1-10-7-11(2)16(28(22,23)24)8-14(10)19-20-15-9-17(29(25,26)27)12-5-3-4-6-13(12)18(15)21/h3-9,21H,1-2H3,(H,22,23,24)(H,25,26,27)/b20-19+ DZCOAQKTFAIFRV-FMQUCBEESA-N 436.459 436.039892256 Exogenous Solid HMDB33383 11606096 CHEM003879 DTXSID1047998 3-[(E)-2-(2,4-dimethyl-5-sulfophenyl)diazen-1-yl]-4-hydroxynaphthalene-1-sulfonic acid