Hydroxynaphthol blue is an azo dye.
Synonyms: (2-naphtholazo-3, 6-disulfonic acid)-2-naphthol-4-sulfonic acid trisodium salt, calcium indicator on sodium chloride
CAS Number: 165660-27-5
Molecular Formula: C20H12N2O11S3Na2
Molecular Weight: 598.48
MDL Number: MFCD00058506
Applications
Hydroxynaphthol blue, disodium salt is used for determining the endpoint in metal complexation titrations.