Liu, Guochao published the artcileAdsorptive separation of binary naphthalene compounds by D201 resin, Formula: C10H9NO4S, the publication is Huanjing Huaxue (2012), 31(3), 372-378, database is CAplus.
D201 strong-base anion exchange resins were used to selectively adsorb and sep. 1-amino-2-naphthol-4-sulfonic acid (1,2,4-acid) and 2-naphthol in binary aqueous solution The effect of pH, concentration, temperature, resin bed height, and flow rate was investigated. The results show that D201 resin had very high adsorption selectivity and adsorption capacity for 1,2,4-acid in pH 3-6. Temperature had very little influence on D201 resin adsorption of 1,2,4-acid and 2-naphthol. The adsorption isotherms of 1,2,4-acid and 2-naphthol on the resin obey Freundlich model. Dynamic adsorption of the mixed aqueous 1,2,4-acid and 2-naphthol solution by D201 resin shows that, to the leak point of 1,2,4-acid, the adsorption effluent contained essentially 2-naphthol only, and 1,2,4-acid was completely adsorbed by the resin. With the increase of the resin bed and the decreases of the initial concentration and flow rate, the leak point was prolonged and the separation coefficient of 1,2,4-acid for 2-naphthol was improved. 1,2,4-Acid adsorbed on the column was eluted quant. by 15% (weight) NH4Cl and 20% (volume) ethanol solution
Huanjing Huaxue 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, Formula: C10H9NO4S.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem