Contact us for more details of our high quality trisodium [5-[[4-[(3-chloro-2-hydroxy-5-sulphophenyl)azo]-3-hydroxyphenyl]azoxy]-2-[2-(4-nitro-2-sulphophenyl)vinyl]benzenesulphonato(5-)]cuprate(3-)（CAS：70304-38-0） Amitychem Corporation will be your strong partner in China with our 15 years experience specialized in the the field, our ISO/SGS/CQC certificated quality, our seriously & timely response service.