CAS NO. 13195-20-5 | 4-Hydroxy-3-[[4'-[[4-[(1-hydroxy-4-sodiosulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]naphthalene-1-sulfonic acid sodium salt |

4-Hydroxy-3-[[4'-[[4-[(1-hydroxy-4-sodiosulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]naphthalene-1-sulfonic acid sodium salt

C.I.31905	Benzo Black Blue R
4-Hydroxy-3-[[4'-[[4-[(1-hydroxy-4-sodiosulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]naphthalene-1-sulfonic acid sodium salt