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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.
Naphthylamine or aminonaphthalene can refer to either of two isomeric chemical compounds: 1-Naphthylamine (1-aminonaphthalene) 2-Naphthylamine (2-aminonaphthalene)
However, it is a weaker bidentate ligand as the nitrogen atom in the naphthylamine group is weakly coordinating due to the dispersal of charge by resonance. For example, it reacts with potassium tetrachloroplatinate in aqueous solution to give ( N -1-naphthyl-ethylenediamine)-dichloroplatinum(II).
The sample or frozen sections is/are fixated in formaldehyde, then immersed for 20 minutes in the Nile blue solution or 30 sec in nile blue A (1% w/v in distilled water) and rinsed with water. For better differentiation, it is dipped in 1% acetic acid for 10–20 minutes or 30 sec until the colors are pure. This might take only 1–2 minutes.
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8-Anilinonaphthalene-1-sulfonic acid (ANS), also called 1-anilino-8-naphthalenesulfonate, is an organic compound containing both a sulfonic acid and an amine group. This compound is used as a fluorescent molecular probe . [ 1 ]
N-Phenylnaphthalen-1-amine (NPN) is an aromatic amine with the chemical formula C 16 H 12 NH.. This molecule is notable for its binding affinity in mouse major urinary protein (MUP).