Hydroxynapthol Blue (Technical Grade)

• CAT Number: C000996
• CAS Number: 63451-35-4
• Molecular Formula: C₂₀H₁₁N₂Na₃O₁₁S₃
• Molecular Weight: 620.47
• Purity: ≥95%
• Synonyms: 3-Hydroxy-4-[(2-hydroxy-4-sulfo-1-naphthalenyl)azo]-2,7-naphthalenedisulfonic Acid Trisodium Salt
• Solubility: DMSO (Slightly), Methanol (Slightly), Water (Slightly)
• Appearance: Dark Blue to Black Sold
• Storage: 4°C, Inert atmosphere, Light sensitive
• IUPAC Name: trisodium;3-hydroxy-4-[(2-hydroxy-4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-2,7-disulfonate
• InChI: InChI=1S/C20H14N2O11S3.3Na/c23-15-9-16(35(28,29)30)13-3-1-2-4-14(13)18(15)21-22-19-12-6-5-11(34(25,26)27)7-10(12)8-17(20(19)24)36(31,32)33;;;/h1-9,23-24H,(H,25,26,27)(H,28,29,30)(H,31,32,33);;;/q;3*+1/p-3
• InChIKey: AUIINJJXRXMPGT-UHFFFAOYSA-K
• SMILES: C1=CC=C2C(=C1)C(=CC(=C2N=NC3=C4C=CC(=CC4=CC(=C3O)S(=O)(=O)[O-])S(=O)(=O)[O-])O)S(=O)(=O)[O-].[Na+].[Na+].[Na+]

Hydroxynaphthol Blue (Technical Grade)（Cat No.:C000996）, is a synthetic dye and indicator. It is a mixture of various components and is commonly used in analytical chemistry and laboratory applications. The compound is used as a pH indicator, with a color change from yellow at acidic pH to blue at alkaline pH. Hydroxynaphthol Blue is also utilized in complexometric titrations to determine metal ions and in spectrophotometric analysis. It is not of high purity as the technical grade, and its exact composition may vary.

Reference

Hamidi, S. et al.: Biosens. Bioelec., 72, 121 (2015);