C.I. Direct Red 81

ChEBI: A naphthalenesulfonic acid that is 7-amino-4-hydroxy-3-({4-[(4-sulfophenyl)diazenyl]phenyl}diazenyl)naphthalene-2-sulfonic acid in which one of the amino hydrogens is replaced by a benzoyl group. The disodium salt is the histological dye 'Sirius red 4B'.

Sirius red 4B (acid form) is a naphthalenesulfonic acid that is 7-amino-4-hydroxy-3-({4-[(4-sulfophenyl)diazenyl]phenyl}diazenyl)naphthalene-2-sulfonic acid in which one of the amino hydrogens is replaced by a benzoyl group. The disodium salt is the histological dye 'Sirius red 4B'. It has a role as a fluorochrome, a histological dye, an environmental contaminant and a poison. It is a member of azobenzenes, a bis(azo) compound, a member of naphthols, a naphthalenesulfonic acid and a member of benzamides. It is a conjugate acid of a Sirius red 4B(2-).

Molecular Weight:631.6
XLogP3:4.7
Hydrogen Bond Donor Count:4
Hydrogen Bond Acceptor Count:12
Rotatable Bond Count:8
Exact Mass:631.08315499
Monoisotopic Mass:631.08315499
Topological Polar Surface Area:224
Heavy Atom Count:44
Complexity:1250
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes