4-[(2,6-dichloro-4-nitrophenyl)azo]-2,5-dimethoxy-benzenediazoniu; CI 37195; AZOIC DIAZO COMPONENT 51; AZOIC DIAZO NO 51; 4-(2,6-dichloro-4-nitrophenylazo)-2,5-dimethoxybenzenediazonium chloride; FastDarkBlueRSaltC.I.37195; C.I. Azoic Diazo Component 51; Diazo Fast Dark Blue R; Azoic Diazo No. 51; Azoic DC 51; Fast Navy Blue RA Salt