El-Dossoki, Farid I. published the artcileProtonation and solvation thermodynamics of some naphthol derivatives in KCl aqueous solution of different ionic strengths, Computed Properties of 116-63-2, the publication is Journal of Chemistry (2016), 7234320/1-7234320/8, database is CAplus.
The acid-base properties of naphthalen-1-ol (L1), naphthalene-1,5-diol (L2), and 4-amino-3-hydroxynaphthalene-1-sulfonic acid (L3) were characterized from pH-metric measurements in pure water and in different concentrations (0-4 mol kg-1) of aqueous KCl solutions at the temperature range of T = (293.15 to 213.15)K at 5K intervals. The results reveal that naphthalen-1-ol and naphthalene-1,5-diol mols. have two ionizable protons (of the hydroxyl groups) while 4-amino-3-hydroxynaphthalene-1-sulfonic acid has three ionizable protons (hydrogen ion of the hydroxyl group, SO3H, and NH3+). Modeling of the data was done by applying Debye-Hoeckel model.The protonation and the solvation processes of all studied ligands are spontaneous and endothermic processes. Also the solubilities of naphthalen-1-ol, naphthalene-1,5-diol, and 4-amino-3-hydroxynaphthalene-1-sulfonic acid were determined The data were analyzed using Setschenow equation and the values of Setschenow coefficients (Km) were determined From the solubility data, the activity coefficients were obtained. The values of the total solubilities (ST) for naphthalen-1-ol and naphthalene-1,5-diol were found equal to the values of their neutral species (S0). On the other hand, the total solubility for 4-amino-3-hydroxynaphthalene-1-sulfonic acid is different from that of its neutral species.The results also indicate solubility decrease in pure water from L1-L2-L3.
Journal of Chemistry published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, Computed Properties of 116-63-2.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem