Synonyms: Fast blue RR salt (NRR,FB) (4-Benzoylamino-2,5-dimethoxy aniline; Fast blue RR salt; Azoic Diazo No. 24; Benzoylaminodimethoxyanilinediaz; Bis[4-benzamido-2,5-dimethoxybenzenediazonium] tetrachlorozincate(2-);4-Benzoylamino-2,5-dimethoxybenzenediazonium chloride hemi(zinc chloride) salt;Fast Blue RR salt; C.I. 37155;