Direct brown 33 (C.I. 35520)
CAS No. 1324-87-4
Direct brown 33 (C.I. 35520);2,7-Naphthalenedisulfonic acid, 5-((diamino((8-hydroxy-6-sulfo-2-naphthalenyl)azo)phenyl)azo)-4-hydroxy-3-((4-((4-hydroxyphenyl)azo)(1,1-biphenyl)-4-yl)azo)-, trisodium salt;C.I. Direct brown 33