4-[(2,6-dichloro-4-nitrophenyl)azo]-2,5-dimethoxy-benzenediazoniu ;CI 37195;FAST DARK BLUE R SALT;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