Category: 116-63-2

Sousa, Ana Catarina published the artcileSynthesis of Substituted 4-Arylamine-1,2-naphthoquinones in One-Pot Reactions Using CotA-Laccase as Biocatalyst, HPLC of Formula: 116-63-2, the publication is Advanced Synthesis & Catalysis (2020), 362(16), 3380-3387, database is CAplus.

An efficient and environmentally benign biocatalytic strategy for the synthesis of substituted 4-arylamino-1,2-naphthoquinones was developed, through a cross-coupling reaction in which the 1,2-naphthoquinone nucleus, formed in the biocatalytic process mediated by CotA-laccase from Bacillus subtilis, is the key synthetic intermediate. Electrochem. data and kinetic parameters were determined revealing a significant higher specificity of CotA-laccase for 4-amino-3-hydroxynaphthalene-1-sulfonic acid (AHNSA). This ability of CotA-laccase to discriminate between oxidisable aromatic amines allows the set-up of one-pot reactions in the presence of the enzyme, between AHNSA and a set of appropriate aromatic amines under mild reaction conditions.

Advanced Synthesis & Catalysis 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 C8H17Br, HPLC of Formula: 116-63-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

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 (K_m) 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

Karaman, Yeliz published the artcileInvestigation of electrochemical behavior of Calmagite at a glassy carbon electrode, Application of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Dyes and Pigments (2014), 39-44, database is CAplus.

The voltammetric behavior of 1-(1-hydroxy-4-methyl-2-phenylazo)-2-naphthol-4-sulfonic acid (Calmagite) was studied by square-wave voltammetry (SWV), differential pulse voltammetry (DPV), cyclic voltammetry (CV) and d.c. voltammetry (DCV) in different electrolyte media. The voltammograms recorded at a glassy C electrode (GCE) exhibit one cathodic peak, corresponding to the two-step four-electron reduction process of azo compound The observed shift of the compound reduction peaks to more neg. potentials with increasing pH indicates that H ions are involved in the electrode reaction. The effect of scan rate and pH on the reduction peaks was studied. From the voltammetric data, the electrochem. reaction mechanism of the azo compound was suggested.

Dyes and Pigments 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, Application of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Zheng, Yajuan published the artcileAn improvement of the method for measurements of silicon content in water for laboratory use, Safety of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Guangdong Huagong (2012), 39(1), 105, 86, database is CAplus.

Platinum crucible intended for determination silicon content in water suffers from several disadvantages that it is very costly, difficult to preserve and not widely accessible. In the paper, the method adopted Teflon pot to replace Platinum crucible in the process of evaporation and condensation can satisfy the requirements of accuracy and precision, meanwhile, the approach utilization Teflon pot is cost-effective and time-saving.

Guangdong Huagong 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 C7H16ClNO2, Safety of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Gai, Hengjun published the artcileExtraction of 1-amino-2-Naphthol-4-Sulfonic acid from wastewater using trioctylamine (N, N-dioctyloctan-1-amine) in methyl isobutyl ketone, COA of Formula: C10H9NO4S, the publication is Journal of Cleaner Production (2018), 774-782, database is CAplus.

Wastewater containing 1-amino-2-naphthol-4-sulfonic acid (ANS) is mainly derived from the dye production process, causing serious environmental problems. In this work, extraction of ANS from wastewater was carried out using trioctylamine (TOA) under condition of Me iso-Bu ketone (MIBK) as a diluent. The effects of diluent type, concentration of TOA, temperature and pH on the distribution coefficient (D) were discussed in detail. The results showed that the value of D = 76 was obtained with TOA (1.41 mol kg^-1) + MIBK at 25°C and pH = 1.1. After that, the extraction mechanism was determined by analyzing the chem. bonds of the complex compound using UV-vis, FT-IR and ¹H NMR. The exptl. results showed that the extractant could be regenerated by back extraction Specially the distillation process was simulated using Aspen Plus and the results verified its feasibility in the process of extractant regeneration. The proposed extraction system is conductive to both environment and technol.

Journal of Cleaner Production 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, COA of Formula: C10H9NO4S.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Shi, Bing Bing published the artcileHighly selective fluorescent sensing for CN^– in water: utilization of the supramolecular self-assembly, Application In Synthesis of 116-63-2, the publication is Chemical Communications (Cambridge, United Kingdom) (2013), 49(71), 7812-7814, database is CAplus and MEDLINE.

A simple 4-amino-3-hydroxynaphthalene-1-sulfonic acid is demonstrated to fluorescently sense CN^– in water based on the mechanism of supramol. self-assembly. This work provides a novel approach for the selective recognition of CN^–. The detection limit of the sensor towards CN^– is 3.2 × 10^-7 M, and other anions, including F^–, Cl^–, Br^–, I^–, AcO^–, H₂PO₄^–, HSO₄^–, and ClO₄^–, had nearly no influence on the probing behavior. Notably, the test strips based on S₄ were fabricated, which could act as convenient and efficient CN^– test kits.

Chemical Communications (Cambridge, United Kingdom) 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 C14H10O4S2, Application In Synthesis of 116-63-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Wu, Fang-Ying published the artcileA dual colorimetric and fluorescent sensor for lead ion based on naphthalene hydrazone derivative, Recommanded Product: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (2013), 221-225, database is CAplus and MEDLINE.

A new compound, 2-boronobenzaldehyde-(2′-hydroxyl-4′-sulfonic acid) naphthalene hydrazone (1), was synthesized and its structure was characterized by ¹H NMR, mass and element analyses. The presence of Pb²⁺ led 1 to undergo colorimetric and fluorescent changes, which were detectable with the naked eye. Thus, a dual spectral response for Pb²⁺ detection was introduced. In KH₂PO₄-NaOH buffer aqueous solution (pH 6.0), 1 exhibited fluorescence enhancement at 568 nm and hyperchromicity at 595 nm upon the addition of Pb²⁺. The fluorescent intensity change was proportionate to the concentration of Pb²⁺ with a dynamic working range of 5.0 × 10^-7 mol L^-1 to 1.0 × 10^-4 mol L^-1 and a detection limit of 3.7 × 10^-8 mol L^-1. The fluorometric method was successfully applied for the detection of Pb²⁺ water of Qianhu Lake and soil in Nanchang university campus. The recoveries were 111-116% for water and 97.6% for soil, resp., determined via the standard addition method.

Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy 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 C10H10O2, Recommanded Product: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Tabanligil Calam, Tugba published the artcileElectrochemical determination of 8-hydroxyquinoline in a cosmetic product on a glassy carbon electrode modified with 1-amino-2-naphthol-4-sulphonic acid, Computed Properties of 116-63-2, the publication is Instrumentation Science & Technology (2021), 49(1), 1-20, database is CAplus.

A new voltammetric method was developed for the simple, rapid and inexpensive determination of 8-hydroxyquinoline (8HQ) on a modified electrode obtained by the electrodeposition of 1-amino-2-naphthol-4-sulfonic acid (ANSA) on the surface of a glassy carbon (GC) electrode. The electrode interfacial properties were investigated by electrochem. impedance spectroscopy (EIS). The electrochem. response of the ANSA-GC electrode toward 8-hydroxyquinoline was investigated by the use of square wave voltammetry. The ANSA-GC modified electrode showed two linear plots with 8-hydroxyquinoline concentrations from 5 x 10^-7 to 1.4 x 10^-5 mol dm^-3 (R² of 0.9984) and from 1.4 x 10^-5 to 4.25 x 10^-4 mol dm^-3 with a correlation coefficient R² equal to 0.9967. The limit of detection was 1.6 x 10^-7 mol dm^-3. The ANSA-GC modified electrode also showed excellent stability and reproducibility for up to two weeks. The anal. application of the ANSA-GC modified electrode was investigated for the determination of 8-hydroxyquinoline in a blush cosmetic product. The results in good agreement to those obtained by spectrophotometry as a standard method.

Instrumentation Science & Technology 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 C24H20Ge, Computed Properties of 116-63-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

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

Yuan, Jin-hai published the artcileTreatment of 1,2,4-acid wastewater by ferric-carbon microelectrolysis combined with Fenton oxidation process, Name: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Chongqing Daxue Xuebao, Ziran Kexueban (2011), 34(9), 121-127, database is CAplus.

Experiments on the treatment process of 1,2,4-acid wastewater combined ferric-carbon microelectrolysis with Fenton oxidation process are carried out. The 1,2,4-acid wastewater is produced in the production process of 6-nitry (6-nitro-1-diazo oxygen naphthalene-4-acid). The exptl. conditions of Ferric-Carbon microelectrolysis, including pH value, reaction time, reaction temperature, Fe/C ratio and dosage of active carbon are studied. Fenton oxidation conditions of pH value, dosage of H₂O₂ and the economy data of the process are analyzed. Through single-factor experiments, the conditions for treating acid wastewater are found out. PH value is 1, Fe and C mass ratio is 3:1, and iron-carbon microelectrolysis reaction time is 3 h. The iron-carbon micro-electrolysis water is filtered to adjust its pH value into 3, then 2.5% wastewater of H₂O₂ with mass fraction of 30% is added, a reaction is performed at room temperature for 1 h, the pH value is adjusted into 7∼8, and then the iron-carbon micro-electrolysis water is filtered. The removal efficiency of COD of raw water can be improved to more than 95%. The cost of wastewater treating is 5.4 yuan/m³.

Chongqing Daxue Xuebao, Ziran Kexueban 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 C6H8O4, Name: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem