1- Aminonaphthalene-5-sulfonic acid

AI3-52278 1-Aminonaphthalene-4-sulfonic acid 4-Amino-1-naphthalenesulfbnic acid 4-Amino-1-naphth-allnsulfonsaeure 4-Aminonaphthalene-1-sulphonic acid 1-Amino-4-sulfbnaphthalene EINECS 201-567-9 Kyselina 1-na%lamin-4-sulfbnova Kyselina nafthionova 1-Naphthalenesulfonic acid, 4-amino- 1-Naphthylamin-4-sulfonsaeure a-Naphthylamine-4-sulfonic acid a-Naphthylamine-p-sulfonic acid 1-Naphthylamine-4-sulfonic acid Naphthionic acid ... 

Wei, Z.X., and M.X. Wan. 2003. Synthesis and characterization of self-doped polyjamline-co-aminonaphthalene sulfonic acid) nanotubes. Appl Polym Sci 87 (8) 1297-1301. 

Weber and Laurence (1953) have described a series of substances that although completely nonfluorescent in water solution become strongly fluorescent on adsorption by native serum albumin, denatured ovalbumin, filter paper, or alumina. They are also spontaneously fluorescent in certain solvents. These substances are derivatives of 3-chloro-6-meth-oxy-9-aminoacridine or of one of several aminonaphthalene sulfonic acids, in which one of the amino hydrogens has been substituted by a benzene ring derivative. The explanation of the behavior on adsorption lies apparently in that the radiative transition is forbidden for the nonplanar molecule but is allowed when the molecule lies on a plane as it presumably does on adsorption. This is extensively discussed by Forster (1951). Although the causes of the phenomenon are interesting in themselves, its practical applications may be of importance. Laurence and Rees (1953) have developed a method for the rapid and accurate determination of albumin in blood serum by fluorimetry using 1 N phenyl-aminonaphthalene-5 sulfonic acid. The detection of ovalbumin dena-turation by this method also deserves consideration. The appearance of fluorescence on adsorption of auramin O by nucleic acids has been described by Oster (1951). 

Naphthionic acid (4-aminonaphthalene-l-sulfonic acid) [84-86-6] M 223.3, m > 300°(dec), pK 2.68. It crystallises from H2O as needles of the 0.5 hydrate. Salt solns fluoresce strongly blue. 

Nortemann B, A Glasser, R Machinek, G Remberg, H-J Knackmuss (1993) 5-hydroxyquinoline-2-carboxylic acid, a dead-end metabolite from the bacterial oxidation of 5-aminonaphthalene-2-sulfonic acid. Appl Environ Microbiol 59 1898-1903. 

As a diazonium component, aniline sulfonic acid may occasionally be replaced by 2-aminonaphthalene-l-sulfonic acid or by aniline. 

The use of pyridine during final coupling (pyridine coupling) is illustrated in the following abridged manufacturing specification for C. I. Direct Green 33, 34270 2-aminonaphthalene-8-sulfonic acid —> 3,5-xylidine- 2-ethoxy Cleve acid-6— A-acetyl H acid... 

Copper complexes of these materials or of analogous dyes derived from y acid (l-hydroxy-7-aminonaphthalene-3-sulfonic acid) confer gray-violet [9] and blue... 

Disazo dyes are obtained by using coupling components with a primary amino group and dimerization with phosgene [111]. The diazo components are prepared by exhaustive alkylation of amino methylated 2-aminonaphthalene-1 -sulfonic acid, followed by scission of the sulfonic acid group in the presence of mineral acids [112],... 

In the separation of oligosaccharides, sulfonic acids (mono-, di- or tri-) of aminonaphthalene have been used [29]. Polyuronic acids hke hyaluronic acid have also been characterized by CE [30]. 

Certain sulfonic acids may be cleaved by Na(Hg) thus l-aminonaphthalene-3,8-disulfonic acid can be reductively cleaved to l-aminonapththalene-3-sulfonic acid. The sulfonic group in the 8-position is more easily removed reductively than sulfonic groups in the 2-, 4-, or 6-positions [79]. 

Abbreviations AAO anodic aluminium oxides ANSA 5-aminonaphthalene-2-sulfonic acid APS—Ammonium persulphate ASA — Anthracene Sulfonic acids CB — conduction band CPs — conducting polymers CSA... 

Amination of Schaeffer s acid (2-naphthol-6-sulfonic acid) (50) as its salt at 150-160 °C yields 2-aminonaphthalene-6-sulfonic acid, Bronner s acid (46c) (Scheme 11). 

The jV-aryl aminonaphthalenes, including sulfonic acids, are made from reactions involving aniline and a suitable naphthalene derivative. Thus the reaction between aniline and 2-naphthol (35) in the presence of an acid catalyst, e.g. sulfanilic acid, affords A-phenyl-2-naphthylamine (51). 

From a theoretical point of view this is an extremely interesting reaction. The displacement of a hydroxyl group from a saturated carbon atom appears to be unknown in basic solution. The fact that amino-methane sulfonic acid can be isolated from the bisulfite addition product of formaldehyde on treatment with ammonia does not prove, of course, that a direct displacement, such as is indicated in XVI to XVII, actually occurred. Furthermore, it is quite clear that preliminary formation of an imine (XVIII) is not necessary for the reaction of aromatic amines with sodium bisulfite (steps XIX to XVIII to XVII, etc.). 1-Dimethyl-aminonaphthalene-4-sulfonic acid (XX) and l-aminonaphthalene-4-sulfonic acid (XIX) show similar reaction kinetics 16a when treated with sodium bisulfite, yet with the tertiary amine (XX) it is not possible to write an imino structure corresponding to XVIII. 

Fluorescence spectroscopy is another powerful technique that can be utilized to study protein conformation in solution. Fluorescent probes like TNS [6-(p-toluidino)naphthalene-2-sulfonic acid], a hydro-phobic probe, and a sulfhydryl probe such as acry-lodan [6-(acryloyl-2-dimethyl aminonaphthalene] are useful for studying protein conformation. Twelve-kDa... 

Aminonaphthalene-7-sulfonic acid 8-Amino-naphthalene-2-sulfonic acid 8-/kminonaphthalene-2-sulphonic acid 1-Amino-7-sulfonaphlhalene Cassella s acid C.l. 26135 Qeve s acid 1,7-Cleve s acid Cleve s theta-acid Delta acid EINECS 204-311-4 F acid J acid 2-Naphthalenesulfonic acid, 8-amino- 1-Naphthylamine-7-sulfonic acid 8-Naphthylamine-2-sulfonio acid NSC 4983. Used as an intermediate for azo dyes. Crystallizes as the monohydrate, soluble in H2O (0.45 g/100 ml). 

Amino-8-naphthalene sulfonate 1-Aminonaphthaiene-8-sulfonic xid 8-Aminonaphthalene-1-sulphonic acid 8-Amino-1-naphthalenesulfonic acid EINECS 201-437-1 Naphthylaminemonosulfonic acid S a-Naphthylamine-8-sulfonic acid 1-Naphthalenesulfonic acid, 8-amino- 1-Naphthylamine-8-sulfonic xid NSC 7798 peri Acid. Used in the manufacture of dyestuffs as an azo dye intermediate. Soluble in H2O (20 mg/100 ml at 20 , 416 mg/100 ml at 100 ), freely soluble in AcOH, Kalpana Chemicals M/s. Textile Colour and Chemical (Exporfs). 

Naphthalenediamine and its derivatives are obtained by heating 4-aminonaphthalene-2-sulfonic acid with ammonia or an amine at 160-180° under pressure any sulfo groups in the other ring are unaffected. 4-Hydroxynaphthalene-2-sulfonic acid exchanges both its sulfo and its hydroxyl group.1198... 

This reaction was first reported by Bucherer in 1906. It is the synthesis of carbazoles from aryl hydrazines, sodium bisulfite, and 1- or 2-naphthols (or 1- or 2-naphthylamines) and is generally known as the Bucherer carbazole synthesis or Bucherer reaction. In addition, the reaction between 2-aminonaphthalene-l-sulfonic acid and phenylhydrazine also gives carbazole, indicating that sulfonation of naphthylamine might be the early step in the reaction pathway. This reaction has been most commonly used hitherto for the preparation of dibenzocarboles. ... 

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