Syonyms Name: C.I. 27700; C.I. Direct Black 17; C.I. Direct Black 17, monosodium salt; Direct Black 17 (27700); Direct Black 17; sodium (3Z)-6-amino-3-({4-[(E)-(4-aminophenyl)diazenyl]-2-methoxy-5-methylphenyl}hydrazono)-4-oxo-3,4-dihydronaphthalene-2-sulfonate; sodiu