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Hydroxynaphthol blue is an azo dye. It is used for determining the endpoint in complexometric titrations/Metal Titration. References This page was last ...
Bromothymol blue acts as a weak acid in a solution. It can thus be in protonated or deprotonated form, appearing yellow or blue, respectively. It is bright aquamarine by itself, and greenish-blue in a neutral solution. The deprotonation of the neutral form results in a highly conjugated structure, accounting for the difference in color. An ...
Naphthol blue black Acid black 1 20470 diazo 1064-48-8: Aniline black: Pigment black 1 Oxidation base 1 50440 azine 13007-86-8: Aniline Yellow: Sudan yellow R Induline R Solvent yellow 1 11000 azo 60-09-3: Anthracene blue SWR Alizarin blue 2RC Mordant blue 32 58605 anthraquinone 6372-24-6: Anthrapurpurin: 1,2,7-Trihydroxyanthraquinone 58255 ...
Notice that the coupling occurs adjacent to the hydroxy group. 3-Hydroxy-2-naphthoic acid is a precursor to many anilides, such as Naphthol AS, which are reactive toward diazonium salts to give deeply colored azo compounds. Azo coupling of 3-hydroxy-2-naphthoic acid gives many dyes as well. Heating 3-hydroxy-2-naphthoic acid in ammonia give 3 ...
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 ...
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A complexometric indicator is an ionochromic dye that undergoes a definite color change in presence of specific metal ions. [1] It forms a weak complex with the ions present in the solution, which has a significantly different color from the form existing outside the complex.
Turmeric. Curcumin, the active ingredient in turmeric, is a potent antioxidant and anti-inflammatory compound that research is showing could benefit people with Alzheimer’s, says Kimberlain ...