C.I. Direct Black 131 is a chemical compound registered under CAS number 6486-54-0, with the molecular formula C38H28N8O10S3 and a molecular weight of about 852.87 g/mol. It is also known as 2,7-Naphthalenedisulfonic acid, 4-amino-3-((4'-((1-amino-5-sulfo-2-naphthalenyl)azo)(1,1'-biphenyl)-4-yl)azo)-5-hydroxy-6-(phenylazo)-, trisodium salt; (3E)-5-amino-6-[(E)-{4'-[(E)-(1-amino-5-sulfonaphthalen-2-yl)diazenyl]biphenyl-4. SixChem supplies C.I. Direct Black 131 for laboratory research and bulk production; product code 428752. Send an inquiry for purity, packaging, price and lead time.