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1-Naphthol, or α-naphthol, is an organic compound with the formula C 10 H 7 OH. It is a fluorescent white solid. 1-Naphthol differs from its isomer 2-naphthol by the location of the hydroxyl group on the naphthalene ring. The naphthols are naphthalene homologues of phenol. Both isomers are soluble in simple organic solvents. They are ...
N-(1-Naphthyl)ethylenediamine dihydrochloride is widely used in the quantitative analysis of nitrate and nitrite in water samples by colorimetry. It readily undergoes a diazonium coupling reaction in the presence of nitrite to give a strongly colored azo compound .
The sulfonic acid derivatives of 1-naphthylamine are used for the preparation of azo dye.These compounds possess the important property of dyeing unmordanted cotton.. An important derivative is naphthionic acid (1-aminonaphthalene-4-sulfonic acid), which is produced by heating 1-naphthylamine and sulfuric acid to 170–180 °C in the presence of crystallized oxalic acid.
With NaOH, converts to 5-amino-1-naphthol ("purpurol"). 1-Aminonaphthalene-6-sulfonic acid: 119-79-9: 1,6-Cleve’s acid (named after swedish chemist Per Teodor Cleve) sulfonation of 1-aminonaphthalene: 1-Aminonaphthalene-7-sulfonic acid: 119-28-8: 1,7-Cleve’s acid: by-product in production of 1,6-Cleve’s acid, precursor to C.I. Acid Black ...
There is no more than 1 sigma bond between any two atoms. Molecules with rings have additional sigma bonds, such as benzene rings, which have 6 C−C sigma bonds within the ring for 6 carbon atoms. The anthracene molecule, C 14 H 10, has three rings so that the rule gives the number of sigma bonds as 24 + 3 − 1 = 26. In this case there are 16 ...
Naphthol yellow S is an organic compound that is a dye. It is a derivative of 1-naphthol . At one time it was a popular food colorant but it was delisted in 1959 in the U.S. [ 3 ]
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It is a white solid, although commercial samples can appear gray. [1] It is used in the synthesis of azo dyes such as Rocceline (a. k. a. Solid Red A), during which the amino group of the acid (in the form of a salt) is diazotated and then coupled with, in the case mentioned, β-naphthol. It is prepared by treating 1-aminonaphthalene with ...