6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid)

Name :6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid)

Synonyms:7,7'-(Carbonyldiimino)bis[4-hydroxy-2-naphthalenesulfonicacid];4,4'-Dihydroxy-7,7'-ureylenedi(naphthalene-2-sulphonic acid)

Molecular Structure :

Molecular Formula :C21H16N2O9S2

Molecular Weight :504.48

CAS Registry Number :134-47-4

EINECS :205-142-9

Appearance white powder dried
Content ≥ 80
Free-mediated acid ≤ 0.2% (HPLC)
Insoluble ≤ 0.2%
Chlorine content ≤ 5%
Uses: Azo dyes intermediates, mainly used for preparation of direct Orange S, Direct Fast Scarlet 4BS dye.