2,5-Dimethoxy-4-((4-nitrophenyl)azo)benzenediazonium tetrachlorozincate (2:1) 64071-86-9 Benzenediazonium, 2,5-dimethoxy-4-((4-nitrophenyl)azo)-, (T-4)-tetrachlorozincate(2-) (2:1) EINECS 264-656-1